HELP
The ratio of the length of a rectangle to its width is 7 : 2. If the perimeter of the rectangle is 108 centimeters, what are the dimensions of the rectangle?

Answers

Answer 1

Check the picture below.

[tex]7x+7x+2x+2x=108\implies 18x=108\implies x=\cfrac{108}{18}\implies x=6 \\\\\\ ~\hfill~\underset{ Length }{\stackrel{ 7(6) }{\text{\LARGE 42}~cm}}\hspace{5em}\underset{ Width }{\stackrel{ 2(6) }{\text{\LARGE 12}~cm}}~\hfill~[/tex]

HELP The Ratio Of The Length Of A Rectangle To Its Width Is 7 : 2. If The Perimeter Of The Rectangle
Answer 2

Answer:

length is 42 width is 12

Step-by-step explanation:

HELP The Ratio Of The Length Of A Rectangle To Its Width Is 7 : 2. If The Perimeter Of The Rectangle

Related Questions

Find a formula for the quadratic function whose graph has a y-intercept of y=5 and x-intercepts at x=1,10. NOTE: Enter the exact answer. Find the equation of the line through the y-intercept of y=x^4−5x^5−13+7x^2
and the x-intercept of y=4x−16. NOTE: Enter the eract answer.

Answers

The equation of the line passing through y-intercept of y=x⁴−5x⁵−13+7x² and the x-intercept of y=4x−16 isy = 4x - 16

From the question above, quadratic function whose graph has a y-intercept of y = 5 and x-intercepts at x = 1, 10

We know that, If the quadratic function has x-intercepts at (a, 0) and (b, 0), then the quadratic function is given as

f(x) = a(x - b)(x - c)

where c = b.

If the quadratic function has y-intercept at (0, a), then the quadratic function is given as

f(x) = ax^2 + bx + c

Now, we have; y-intercept = 5 therefore, f(0) = 5

Putting the values in equation of quadratic function, we get;

5 = a(0 - 1)(0 - 10)⇒ 5 = -10a⇒ a = -1/2

Therefore, the equation of the quadratic function isf(x) = -1/2(x - 1)(x - 10) = -1/2(x^2 - 11x + 10) = -1/2x² + 11/2x - 5

Here, the quadratic function is given by `-1/2x² + 11/2x - 5`

The equation of the line can be found using the x-intercept and y-intercept of the given function.

y = x⁴− 5x⁵ − 13 + 7x²

y = 4x - 16

We know that,If the equation of a line is y = mx + b, thenm is the slope of the line

b is the y-intercept of the line.

Now, we have the equation of the line y = 4x - 16, y-intercept = -16 therefore, b = -16

Slope of the line = 4

Therefore, the equation of the line passing through y-intercept of y=x⁴−5x⁵−13+7x² and the x-intercept of y=4x−16 isy = 4x - 16

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Use the function to evaluate the indicated expressions and simplif f(x)=2x^2+4 
f(x+2)= 
f(x)+f(2)=

Answers

f(x+2) = 2x^2 + 8x + 12

f(x) + f(2) = 2x^2 + 16

Let's evaluate the expressions using the given function f(x) = 2x^2 + 4.

To find f(x+2), we substitute (x+2) in place of x in the function.

f(x+2) = 2(x+2)^2 + 4

To simplify this expression, we need to expand the square term (x+2)^2.

(x+2)^2 = (x+2)(x+2) = x(x+2) + 2(x+2) = x^2 + 2x + 2x + 4 = x^2 + 4x + 4

Now, substituting this value back into the original expression:

f(x+2) = 2(x^2 + 4x + 4) + 4

Simplifying further:

f(x+2) = 2x^2 + 8x + 8 + 4

f(x+2) = 2x^2 + 8x + 12

For the expression f(x) + f(2), we need to evaluate f(x) and f(2) separately, and then add them together.

f(x) = 2x^2 + 4

f(2) = 2(2)^2 + 4

f(2) = 2(4) + 4

f(2) = 8 + 4

f(2) = 12

Now, we can add f(x) and f(2):

f(x) + f(2) = (2x^2 + 4) + 12

f(x) + f(2) = 2x^2 + 4 + 12

f(x) + f(2) = 2x^2 + 16

So, the simplified expressions are:

f(x+2) = 2x^2 + 8x + 12

f(x) + f(2) = 2x^2 + 16

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From a point 12 m from the wall of a tall building an observer with a sextant measures the angle of elevation of two windows, one above the other, as 61 ∘ 56 ′ and 71 ∘ 4 ′ respectively. What is the vertical distance between the windows?

Answers

The vertical distance between the windows is approximately 10.07 meters.

To find the vertical distance between the windows, we can use trigonometry. Let's consider the observer's line of sight as a line from the observer's position to the top window. This forms a right triangle with the vertical distance between the windows as the opposite side, the horizontal distance as the adjacent side, and the line of sight as the hypotenuse.

Using the trigonometric function tangent, we can calculate the vertical distance:

For the top window:

tan(71° 4') = vertical distance / 12 m

Solving for the vertical distance gives:

vertical distance = 12 m * tan(71° 4')

For the bottom window:

tan(61° 56') = (vertical distance + x) / 12 m

Solving for the vertical distance gives:

vertical distance + x = 12 m * tan(61° 56')

Now, subtracting the two equations, we get:

x = 12 m * (tan(61° 56') - tan(71° 4'))

Substituting the values and calculating, we find that the vertical distance between the windows is approximately 10.07 meters.

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Find the function value, if possible. (If an answer is undefined, enter UNDEFINED.)
f(x) = 3x − 6
a)f(-3)
(c) f(x + 3)

Answers

a) the value of the function f(-3) is -15.     b) the value of the function f(x+3) is 3x + 3.

Function is f(x) = 3x − 6

(a) f(-3) Putting x = -3 in the function, we get f(x) = 3x − 6⇒f(-3) = 3(-3) - 6= -9 - 6= -15.

Therefore, the value of the function f(-3) is -15.

(c) f(x + 3)Putting x + 3 in the function, we get f(x) = 3x − 6⇒f(x+3) = 3(x+3) - 6= 3x + 9 - 6= 3x + 3.

Therefore, the value of the function f(x+3) is 3x + 3.

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Consider the following axiom set, in which x 's, y 's, and "on" are the undefined terms: Axiom 1. There exist exactly five x 's. Axiom 2. Any two distinct x 's have exactly one y on both of them. Axiom 3. Each y is on exactly two x 's.

Answers

The axiom set states that there are exactly five objects labeled x, and any two distinct x's have exactly one object labeled y on both of them. Additionally, each object labeled y is on exactly two objects labeled x.

The given axiom set provides information about the relationships between the undefined terms x, y, and "on." Axiom 1 states that there are exactly five objects labeled x. This means that there are precisely five x's in the system.

Axiom 2 states that for any two distinct x's, there is exactly one object labeled y on both of them. This implies that every pair of distinct x's will have a unique y on them. For example, if we have x1 and x2, there will be one y on both x1 and x2.

Axiom 3 states that each object labeled y is on exactly two objects labeled x. This means that each y is associated with two x's. For instance, if we have y1, it will be on two different x's.

Overall, this axiom set provides the foundational rules for the objects x, y, and their spatial relationships in the system. It establishes the quantity of x's, the unique relationship between x's and y's, and the presence of y's on two x's. These axioms lay the groundwork for further exploration and calculations within this particular system.

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Identify the first 5 terms of the sequence. A(n) = 5 + (n - 1) * 10​

Answers

The first 5 terms of the sequence are: 5, 15, 25, 35, 45.

To find the first 5 terms of the sequence given by A(n) = 5 + (n - 1) * 10, we substitute the values of n from 1 to 5 into the formula.

A(1) = 5 + (1 - 1) * 10 = 5 + 0 = 5

A(2) = 5 + (2 - 1) * 10 = 5 + 10 = 15

A(3) = 5 + (3 - 1) * 10 = 5 + 20 = 25

A(4) = 5 + (4 - 1) * 10 = 5 + 30 = 35

A(5) = 5 + (5 - 1) * 10 = 5 + 40 = 45

Therefore, the first 5 terms of the sequence are: 5, 15, 25, 35, 45.

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For the expression that follows, replace x with 30° and then simplify as much as possible. 4cos(3x−45°)

Answers

The x = 30°, the simplified value of 4cos(3x - 45°) is 2√2.

To simplify the expression 4cos(3x - 45°) when x = 30°, we substitute the given value of x into the expression:

4cos(3(30°) - 45°)

First, we simplify the inside of the cosine function:

3(30°) - 45° = 90° - 45° = 45°

Substituting this back into the expression:

4cos(45°)

Next, we evaluate the cosine of 45 degrees:

cos(45°) = √2/2

Finally, we substitute this value back into the expression:

4 * (√2/2) = 2√2

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You have 6 liters of paint to share evenly among you and your 4 brothers.

Which equation describes how many liters of paint each of you will receive?

Answers

The equation to represent the litres of paint each receives is x - 6/5= 0. It is a linear equation. Here x represents the portion received by you as well as the 4 brothers.

To put it in words, the total amount of paint divided by the total number of people equals the amount of paint received by each.

If the amount of paint received by each( you+ no of brothers) = x

Amount of paint received by ( 1+ 4 ) people = x

x *5 = 6 litres since they all are getting an equal amount and it is given total paint is 6 litres.

therefore x = 6/5

By subtracting 6/5 simplified to 1.2 litres from x, we are making the equation 0. This means that the sum of all paint portions of people should equal to total available as per the condition given in the question. Rearranging it, we will get the final answer as, x - 6/5= 0.

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Solve for x in the equation 3x² + 2x - 3 = 0
Note apply to correct significant figure

Answers

The solutions for the quadratic equation are approximately x = -1.17 and x = 0.50 (rounded to two decimal places, as specified by "apply to correct significant figure").

The equation that we need to solve for x is: 3x² + 2x - 3 = 0. To solve this quadratic equation we can use the quadratic formula, which states that: [tex]$$x=\{-b\pm \sqrt{b^2-4ac}/}{2a}$$[/tex] Where a, b, and c are the coefficients of the quadratic equation. Using this formula, we get:[tex]$$x=\{-2\pm\sqrt{2^2-4(3)(-3)}}/{2(3)}$$[/tex]

Simplifying:

[tex]$$x=\frac{-2\pm\sqrt{4+36}}{6}$$$$x=\frac{-2\pm\sqrt{40}}{6}$$$$x=\frac{-2\pm2\sqrt{10}}{6}$$$$x=\frac{-1\pm\sqrt{10}}{3}$$[/tex]

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Cheryl was taking her puppy to get groomed. One groomer. Fluffy Puppy, charges a once a year membership fee of $120 plus $10. 50 per

standard visit. Another groomer, Pristine Paws, charges a $5 per month membership fee plus $13 per standard visit. Let f(2) represent the

cost of Fluffy Puppy per year and p(s) represent the cost of Pristine Paws per year. What does f(x) = p(x) represent?

Answers

The functions f(x) and p(x) represent the cost of grooming services for Fluffy Puppy and Pristine Paws, respectively, over a period of x years.

Specifically, f(x) = the cost of Fluffy Puppy per year * x years. It represents the total cost of grooming services at Fluffy Puppy over x years. The cost consists of a once a year membership fee of $120 plus $10.50 per standard visit, multiplied by the number of years.

On the other hand, p(x) = the cost of Pristine Paws per year * x years. It represents the total cost of grooming services at Pristine Paws over x years. The cost consists of a $5 per month membership fee plus $13 per standard visit, multiplied by the number of years.

In summary, f(x) = p(x) means that the total cost of grooming services at Fluffy Puppy over x years is equal to the total cost of grooming services at Pristine Paws over the same x years. It equates the costs of the two groomers for a given time period.

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Find the last two digits of (333)³³³. a) 63 b) 13 c) 93 d) 23

Answers

Let's find the last two digits of (333)³³³ using the cyclicity method of finding the last n digits of the number.To find the last two digits of (333)³³³, we should follow the following steps:Step 1: Find the cyclicity of 3¹, 3², 3³, 3⁴, 3⁵... and so on until 3ⁿ. Step 2: Reduce the exponent in the expression (333)³³³ by the cyclicity found in step 1.Step 3: Take the reduced exponent and find the corresponding digit using the table obtained in step 1.Now let's follow these steps in finding the last two digits of (333)³³³:Step 1: Cyclicity of 3The cyclicity of 3 is as follows: 3¹, 3², 3³, 3⁴, 3⁵, 3⁶...Unit digit: 3, 9, 7, 1, 3, 9...Tens digit: 0, 0, 2, 6, 8, 2...Since the cyclicity repeats itself after every 4th term in the unit digit, we can say that the cyclicity of 3ⁿ has a unit digit equal to the unit digit of 3 raised to the power n mod 4.So we can make the following table:Power (n) Modulus (n mod 4) Unit digit of 3ⁿ0 0 11 1 33 3 97 1 33 3 97 1 33 3 9...  ...  ...  ...  ...Step 2: Reduce the exponentUsing the table obtained in step 1, we can reduce the exponent as follows:333³³³ mod 4 = 1Therefore, we can reduce the exponent as follows:333³³³ ≡ 333¹ (mod 4)Step 3: Find the corresponding digitUsing the table obtained in step 1, we can say that the last two digits of 3¹ is 03. Therefore, the last two digits of (333)³³³ are also 03.Answer: d) 23

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1. Is there another way to conceptualize the
formula for the area of a trapezoid? If so, how?
2. What do you think is meant by the concept of
area?

Answers

Yes, there is another way to conceptualize the formula for the area of a trapezoid. Instead of using the formula A = (a + b) * h / 2, you can break the trapezoid into two triangles and a rectangle.

To find the area of a trapezoid, you can divide it into two triangles and a rectangle. The two triangles have the same height as the trapezoid and their bases are the two parallel sides. So, the area of each triangle is 1/2 * base * height. The rectangle has the same length as the height of the trapezoid and its width is the difference between the two parallel sides.

So, the area of the rectangle is length * width. Finally, you can add the areas of the two triangles and the rectangle to get the total area of the trapezoid.  The concept of area helps us understand the size or extent of a shape or surface. It is important in various fields like geometry, architecture, physics, and more.

Area can be calculated for various shapes, such as squares, rectangles, circles, triangles, and trapezoids. It allows us to compare and analyze the size of different objects or regions. By knowing the concept of area, we can determine the amount of material needed to cover a surface or calculate the space occupied by an object.

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I don’t understand what to do. I need help by an expert in maths please

Answers

Answer:

6

Step-by-step explanation:

We can use the equation:

Range= maximum value - minimum value

5 = x - 1

add 1 to both sides

6=x

So, the maximum value is 6.

Hope this helps! :)

Here are two closed containers and four balls just fit in each container.
0000 30
Container A
Container B
Each ball has a diameter of 60 mm.
Which container has the smaller surface area? A or B?
You must show your working (using mm).
Show your working
+
Curved surface area
of a cylinder is 2+rh

Answers

Both containers have the same surface area.

How to determine Which container has the smaller surface area

To determine which container has the smaller surface area, let's calculate the surface area of each container.

Container A:

Since each ball has a diameter of 60 mm, the radius (r) of each ball is 30 mm (half of the diameter).

Container A has four balls, so the total height of the container (h) is 4 times the radius of a ball, which is 120 mm.

The curved surface area (C.A.) of a cylinder is given by the formula: C.A. = 2πrh.

For Container A:

C.A. = 2π(30 mm)(120 mm)

C.A. = 7200π mm²

Container B:

Container B also has four balls with a diameter of 60 mm, so the radius (r) and height (h) are the same as in Container A.

For Container B:

C.A. = 2π(30 mm)(120 mm)

C.A. = 7200π mm²

Both Container A and Container B have the same curved surface area, which is 7200π mm².

Therefore, both containers have the same surface area.

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There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a blue marble is 7/9.
There are 63 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be.

Answers

There must be 14 red marbles in the bag.

Let's assume the number of red marbles in the bag is represented by "r."

We know that the total number of marbles in the bag is 63. Therefore, the number of blue marbles can be calculated as (63 - r).

The probability of choosing a blue marble is given as 7/9. This probability can be expressed as the number of favorable outcomes (blue marbles) divided by the total number of possible outcomes (total marbles):

(blue marbles) / (total marbles) = 7/9

Substituting the values, we have:

(63 - r) / 63 = 7/9

To solve for "r," we can cross-multiply and solve the resulting equation:

9(63 - r) = 7 * 63

567 - 9r = 441

-9r = 441 - 567

-9r = -126

r = -126 / -9

r = 14

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For real gas, the equation of state can be written as: PV=∑n=0[infinity]​λn​Pn or PV=∑n=0[infinity]​μn​V−n…(2) Show that μn​=n!∑(α)​∏l=0[infinity]​αl​!λlαl​​​, where ∑l=0[infinity]​lαl​=n and ∑l=0[infinity]​αl​=n+1

Answers

For real gas,the equation can be written as μn = n! * ∑(α) ∏l=0[∞] αl! * λlαl​​​.

How can the coefficient μn be expressed in terms of the parameters αl and λl in the equation of state for a real gas?

The coefficient μn in the equation of state for a real gas can be expressed in terms of the parameters αl and λl as follows:

In the given equation PV = ∑n=0[∞] λnPn or PV = ∑n=0[∞] μnV^(-n) (equation 2), the coefficients λn and μn represent the contributions of the different powers of the pressure (P) and volume (V), respectively. To express μn in terms of αl and λl, we need to consider the following steps:

Step 1: Express μn as a product of factorials and summations.

μn = n! * ∑(α) ∏l=0[∞] αl! * λlαl​​​

Step 2: Define the parameters αl and λl.

Here, ∑l=0[∞] lαl = n, and ∑l=0[∞] αl = n + 1.

Step 3: Substitute the values of αl and λl in the expression for μn.

By substituting the given values, we have:

μn = n! * ∑(n) ∏l=0[∞] αl! * λlαl​​​

In summary, the coefficient μn in the equation of state for a real gas can be expressed as n! times the product of the factorials of αl and the summation of αl raised to the power of λl, where the parameters αl satisfy ∑l=0[∞] lαl = n and ∑l=0[∞] αl = n + 1.

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What is the missing statement in step 4?

Answers

The missing statement to complete step 4 is given as follows:

a) <ACE is congruent to <BCD,

What is the reflective property of angle congruence?

The reflective property of angle congruence states that an angle is always congruent to itself.

In the figure, we have that:

The vertex of <ACE is at angle C.The vertex of <BCD is at angle C.

Hence the two angles are congruent, as are the angles of the step 3, meaning that the triangles are similar by the AA congruence theorem.

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8.65 percent compounded monthly. (Round answer to 2 decimal places, e.g. 15.25%.) Effective annual rate \%

Answers

The effective annual rate for a 8.65% interest compounded monthly is 9.14%.

To calculate the effective annual rate, we need to take into account the compounding frequency. In this case, the interest is compounded monthly.

We can use the formula for compound interest to calculate the effective annual rate:

Effective Annual Rate = (1 + (interest rate / compounding frequency))^compounding frequency - 1

Plugging in the given values:

Effective Annual Rate = (1 + (8.65% / 12))^12 - 1

                     = (1 + 0.0072083)^12 - 1

                     = 1.0072083^12 - 1

                     ≈ 0.0914 or 9.14%

Therefore, the effective annual rate for a 8.65% interest compounded monthly is approximately 9.14%.

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You are given three equations below which explains the return on an investment. Provide and explanation of what each of these says about the return on your investment.

Return = Yield - D X (△ yield)

Return = Cash Rate + ( Yield - Cash Rate) - D X (△ yield)

(5 Marks)

What does a Yield curve represent and why are they typically upward sloping? Demonstrate where the current yield curve of the South African bond market is, the direction it will go at the backdrop of rising inflation and central bank increasing rates.

(5 Marks)

To what extent does environmental, Social and Governance (ESG) consideration and Sustainable Investment have in the context of international diversification and Regulation 28 in particular.

(5 Marks)

Answers

1. The first equation, "Return = Yield - D X (△ yield)," suggests that the return on the investment is equal to the yield minus a proportion of the change in yield.

The term "D X (△ yield)" represents a discount factor applied to the change in yield. This equation indicates that the return is influenced by both the initial yield and the change in yield over time.

2. The second equation, "Return = Cash Rate + (Yield - Cash Rate) - D X (△ yield)," introduces the concept of a cash rate. It states that the return is composed of the cash rate plus the difference between the yield and the cash rate, with a discount factor applied to the change in yield. This equation implies that the return incorporates the cash rate as a base return and adjusts it based on the yield and changes in yield.

3. The third equation does not explicitly mention return, but it likely pertains to the calculation of return or some related aspect. Without further information, it is difficult to provide a precise interpretation or explanation of this equation.

Regarding the yield curve, it represents the relationship between the yields of bonds with different maturities. An upward-sloping yield curve is typically observed when longer-term bonds have higher yields compared to shorter-term bonds.

This is because investors usually expect higher compensation for the increased risk and uncertainty associated with longer maturities. The upward slope reflects the market's anticipation of rising interest rates or inflation in the future.

To analyze the South African bond market's current yield curve, one would need up-to-date data on the yields of bonds with varying maturities. In the context of rising inflation and central bank rate increases, the yield curve may flatten or even become inverted. This would indicate a decrease in longer-term yields compared to shorter-term yields, reflecting expectations of lower inflation or interest rates in the future.

In the context of international diversification and Regulation 28, environmental, social, and governance (ESG) considerations and sustainable investments play a significant role. Regulation 28, which applies to retirement funds in South Africa, sets guidelines for investment diversification and risk management.

It encourages the consideration of ESG factors in investment decisions to promote sustainable and responsible investing practices. By incorporating ESG criteria into international diversification strategies, investors can align their portfolios with sustainable objectives, mitigate risks associated with non-compliance or controversies, and contribute to positive societal and environmental outcomes.

ESG considerations help investors evaluate the long-term sustainability and resilience of investments, taking into account factors such as environmental impact, social responsibility, and governance practices of the companies or assets being invested in.

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(03.05 MC) A pool is built in the shape of an ellipse, centered at the origin. The maximum vertical length is 36 feet, and the maximum horizontal width is 16 feet. Which of the following equations represents the pool?

Answers

The equation that represents the pool that is built in the shape of an ellipse, centered at the origin, with a maximum vertical length of 36 feet, and a maximum horizontal width of 16 feet is [tex]\frac{y^{2} }{324} + \frac{x^{2} }{64}= 1[/tex]. The third option is the correct answer.

An ellipse is a geometric figure that looks like a flattened circle. Ellipses have two distinct radii: the major axis (the longer radius) and the minor axis (the shorter radius). The standard equation for an ellipse is as follows:

[tex]\frac{(x-h)^{2} }{a^{2} } + \frac{(y-k)^{2} }{b^{2} }= 1[/tex], where (h, k) is the center of the ellipse.

If a>b, then the major axis lies horizontally. If b>a, then the major axis is vertical. If a=b, then the ellipse is a circle given by [tex](x-h)^{2} +(y-k)^{2} =r^{2}[/tex].

In this problem, the ellipse is centered at the origin i.e., (h, k) = (0, 0), the horizontal width (a) of the ellipse is 16 feet, and the vertical length (b) of the ellipse is 36 feet. We get the equation for the pool built in the shape of an ellipse, by substituting the values of h, k, a, and b in the standard equation for an ellipse.

Therefore, the answer is the third option, [tex]\frac{y^{2} }{324} + \frac{x^{2} }{64}= 1[/tex]

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Complete Question:

A pool is built in the shape of an ellipse, centered at the origin. The maximum vertical length is 36 feet, and the maximum horizontal width is 16 feet. Which of the following equations represents the pool?

[tex]\frac{x^{2} }{324} + \frac{y^{2} }{64}= 1[/tex]

[tex]\frac{x^{2} }{1296} + \frac{y^{2} }{256}= 1[/tex]

[tex]\frac{y^{2} }{324} + \frac{x^{2} }{64}= 1[/tex]

[tex]\frac{y^{2} }{1296} + \frac{x^{2} }{256}= 1[/tex]

If z(m/s2) = a x(m3) + b cos (y), what are the units of a, b,
and y?

Answers

Given that the formula is given as z(m/s²) = a x(m³) + b cos (y) Wherea, b, and y are the unknown terms.To determine the units of a, b, and y, we need to check the units of each term present in the equation. The unit of displacement or distance is meters (m).The unit of acceleration is meters per second squared (m/s²).Unit of cos(y) is not there, but we know that cos(y) is a unitless term.Therefore, the given equation can be written askg x m/s² = kg/m x m³ + b x 1There we can see that the unit of the term on the left side of the equation is kg x m/s² which is equal to Newton (N).Therefore, the unit of the term on the right side of the equation is also in Newton (N).Hence,The unit of "a" is N/m³The unit of "b" is NThe unit of "y" is unitless.

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An arithmetic sequence is given below. 27,20,13,6,… Write an explicit formula for the nth term aₙ

Answers

The explicit formula for the nth term (aₙ) of the given arithmetic sequence is aₙ = -7n + 34, where n represents the position of the term in the sequence.

To find the explicit formula for the nth term (aₙ) of the given arithmetic sequence, we need to identify the common difference (d) between consecutive terms.

From the given sequence: 27, 20, 13, 6, ...

We can observe that each term decreases by 7 to obtain the next term. Therefore, the common difference is -7.

Now, we can use the formula for the nth term of an arithmetic sequence:

aₙ = a₁ + (n - 1) * d

Where:

aₙ represents the nth term,

a₁ is the first term,

n is the position of the term,

d is a common difference.

In this case, the first term a₁ is 27 and the common difference d is -7.

Substituting the values into the formula, we have:

aₙ = 27 + (n - 1) * (-7)

Simplifying further, we get:

aₙ = 27 - 7n + 7

aₙ = -7n + 34

Therefore, the explicit formula for the nth term (aₙ) of the arithmetic sequence is aₙ = -7n + 34.

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What is the discriminant, b^2−4ac? (Simplify your answer.) For the following, find the discriminant, b^2−4ac, and then determine whether one real-number solution, two different real-number solutions, or two different imaginary number solutions exist. x^2+2x+4=0

Answers

The discriminant is -12, which is negative. Therefore, there are two different imaginary number solutions for the equation x^2 + 2x + 4 = 0.

To find the discriminant of the quadratic equation x^2 + 2x + 4 = 0, we can compare the equation to the standard form of a quadratic equation, ax^2 + bx + c = 0.

In this case, a = 1, b = 2, and c = 4.

The discriminant is given by the formula:

Discriminant (D) = b^2 - 4ac

Substituting the values into the formula:

D = (2)^2 - 4(1)(4)

D = 4 - 16

D = -12

The discriminant is -12.

Now, to determine the nature of the solutions based on the discriminant:

1. If the discriminant (D) is positive, there are two different real-number solutions.

2. If the discriminant (D) is zero, there is one real-number solution.

3. If the discriminant (D) is negative, there are two different imaginary number solutions.

In this case, the discriminant is -12, which is negative. Therefore, there are two different imaginary number solutions for the equation x^2 + 2x + 4 = 0.

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If sin(θ)= 4/5 ,0 ≤ θ ≤ π/2 then cos(θ) equals tan(θ) equals sec(θ) equals

Answers

When sin(θ) = 4/5 and 0 ≤ θ ≤ π/2, the values of the trigonometric functions are as follows: cos(θ) = 3/5, tan(θ) = 4/3, and sec(θ) = 5/3. These values represent the ratio of the sides of a right triangle with respect to the angle θ in the given range.

If sin(θ)=4/5, 0 ≤ θ ≤ π/2 then cos(θ), tan(θ), and sec(θ) are given by;cos(θ) = √(1 - sin²(θ)) = √(1 - (4/5)²) = √(1 - 16/25) = √(9/25) = 3/5tan(θ) = sin(θ) / cos(θ) = (4/5) / (3/5) = 4/3sec(θ) = 1 / cos(θ) = 1 / (3/5) = 5/3Therefore,cos(θ) = 3/5tan(θ) = 4/3sec(θ) = 5/3. Given that sin(θ) = 4/5 and 0 ≤ θ ≤ π/2, we can determine the values of cos(θ), tan(θ), and sec(θ).

To find cos(θ), we can use the trigonometric identity sin^2(θ) + cos^2(θ) = 1. Since sin(θ) = 4/5, we can substitute it into the equation: (4/5)^2 + cos^2(θ) = 1. Solving for cos(θ), we get cos(θ) = √(1 - (4/5)^2) = √(1 - 16/25) = √(9/25) = 3/5.

Next, to find tan(θ), we can use the formula tan(θ) = sin(θ)/cos(θ). Substituting the values, we have tan(θ) = (4/5) / (3/5) = 4/3.

Lastly, sec(θ) is the reciprocal of cos(θ). Therefore, sec(θ) = 1/cos(θ). Substituting the value of cos(θ), we have sec(θ) = 1 / (3/5) = 5/3.

In summary, when sin(θ) = 4/5 and 0 ≤ θ ≤ π/2, the values of the trigonometric functions are as follows: cos(θ) = 3/5, tan(θ) = 4/3, and sec(θ) = 5/3. These values represent the ratio of the sides of a right triangle with respect to the angle θ in the given range.

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Like many college students, Shannon applied for and got a credit card that has an annual percentage rate (APR) of 12%. The first thing she did was \$10. Assume Shannon makes her payment when she sees her statement at the end of each mont in credit card company compounds interest at the end of each month. 31.2 months 35.8 months 29.3 months 37.8 months 50.0 months graduates). She decides to pay twice the minimum monthly payment ( $20 per month), instead. How much quicker will she pay off the stereo system? 29.5 months 21.1 months 19.5 months 16.8 months 11.6 months If, instead, Shannon wants to have the stereo system paid for by the end of the year, what minimum monthly payment must me mine $32.09
$23.21
$26.65
$35.54

Answers

The correct answer is $32.09.

To determine the time it takes to pay off the stereo system, we need to calculate the number of months based on the minimum monthly payment and the compound interest.

Given that Shannon makes a payment of $10 at the end of each month, we can use the formula for compound interest:

Future Value = Present Value * (1 + (APR/n))^(n*t)

Where:
- Future Value is the amount owed
- Present Value is the initial amount owed
- APR is the annual percentage rate
- n is the number of times interest is compounded per year
- t is the time in years

In this case, the initial amount owed is $10, APR is 12%, n is 12 (since interest is compounded monthly), and t is the number of months it takes to pay off the stereo system.

To find the time it takes to pay off the stereo system with a minimum monthly payment of $20, we can solve for t in the equation:

$10 * (1 + (0.12/12))^(12*t) = $0

Simplifying the equation, we get:

(1 + 0.01)^t = 0

Since any positive number raised to the power of t will be positive, there is no solution for t. This means that Shannon will not be able to pay off the stereo system with a minimum monthly payment of $20.

To find out how much quicker Shannon will pay off the stereo system by making twice the minimum monthly payment, we need to calculate the new time in months.

Using the same formula as before, with a minimum monthly payment of $20, we have:

$10 * (1 + (0.12/12))^(12*t) = $0

Simplifying the equation, we get:

(1 + 0.01)^t = 0

Again, there is no solution for t. This means that Shannon will not be able to pay off the stereo system with a minimum monthly payment of $20.

To determine the minimum monthly payment required to pay off the stereo system in one year, we need to solve for the payment amount in the equation:

$10 * (1 + (0.12/12))^(12*12) = $0

Simplifying the equation, we get:

(1 + 0.01)^12 = 0

Taking the 12th root of both sides, we get:

1 + 0.01 = 0

Simplifying further, we find that the minimum monthly payment required to pay off the stereo system in one year is $32.09.

Therefore, the correct answer is $32.09.

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Please answer with a detailed explanation

Answers

Answer:

False

Step-by-step explanation:

Given:

9 inches = 9*2.5 cm = 22.5 cm

1 m = 100 cm

Height of each mattress = 22.5 cm

Number of mattresses = 7000

Total height of the stack of mattresses = 22.5cm*7000 = 157500 cm

1 m = 100 cm

157500 cm = 157500/100=1575 m

3 times the height of the CN Tower = 3*553 m = 1659m

Therefore, the stack of mattresses is only 1575 m high, which is less than 1659 m. Hence, the company's claim is false.

Prepare a calibration curve by plotting the measured wavenumbers vs. accepted wavenumbers for the seven Hg lines. Fit the data with a linear function and be sure to report the slope and y-intercept with a reasonable number of significant figures. Use the calibration curve to determine the values for the four H emission lines. Calculate the Rydberg constant for hydrogen using these values. Explain how to make all graphs and do all calculations.

theoretical hg values
17264.37
17327.39
18307.39
22938.1
22995.23
24515.88
24705.3
Theoretical H Values
410.1
434
486.1
656.2

Answers

To prepare a calibration curve for the Hg lines, plot the measured wavenumbers against the accepted wavenumbers. Fit the data with a linear function to determine the slope and y-intercept. Then, use the calibration curve to determine the values for the four H emission lines and calculate the Rydberg constant for hydrogen using these values.

Step 1:

To create a calibration curve, plot the measured wavenumbers of the Hg lines on the x-axis and the corresponding accepted wavenumbers on the y-axis. Fit the data points with a linear function to obtain the equation of the line. The slope and y-intercept of the linear function represent the calibration parameters.

Step 2:

The calibration curve provides a relationship between the measured wavenumbers and the accepted wavenumbers for the Hg lines. By fitting the data with a linear function, we can determine the slope and y-intercept, which define the linear relationship. These parameters allow us to convert the measured wavenumbers of unknown samples to their corresponding accepted values.

Step 3:

Using the calibration curve, we can determine the values for the four H emission lines by finding their corresponding measured wavenumbers. By substituting these measured wavenumbers into the linear function obtained from the calibration curve, we can calculate the accepted wavenumbers for the H emission lines.

Step 4:

The Rydberg constant for hydrogen can be calculated using the values obtained for the H emission lines. The Rydberg formula relates the wavenumber of a spectral line to the Rydberg constant, the principal quantum numbers of the initial and final energy levels, and the atomic mass. By rearranging the formula and substituting the known values, we can solve for the Rydberg constant.

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what is the difference between population and sample in statistics

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Population refers to the entire group of individuals or items that share a common characteristic and are of interest to the researcher. It is the complete set of individuals or items from which data is collected and analyzed. For example, if we are studying the average height of all students in a school, the population would include every student enrolled in that school.

Sample, on the other hand, refers to a subset of the population that is selected to represent the whole population. It is a smaller group of individuals or items that are chosen from the population to provide information about the entire population. Using the same example, if we randomly select 100 students from the school to measure their height, those 100 students would be considered the sample.

Here are a few key differences between population and sample:

1. Size: The population is typically larger than the sample. It includes all the individuals or items of interest, while the sample is a smaller representation of the population.

2. Data Collection: It is often more practical and feasible to collect data from a sample rather than the entire population. Gathering data from a large population can be time-consuming, costly, and sometimes even impossible.

3. Representativeness: The sample should ideally be representative of the population. This means that the characteristics and attributes of the sample should closely mirror those of the population. This ensures that the findings from the sample can be generalized to the larger population.

4. Precision: The larger the sample size, the more precise and accurate the estimates are likely to be. A larger sample size reduces the impact of random variability and increases the reliability of the results.

In conclusion, the population refers to the entire group of individuals or items of interest, while the sample is a smaller subset of the population that is chosen to represent the whole. The choice between using a population or a sample depends on various factors such as feasibility, time, resources, and the research objectives.

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i need help ASAP!!!

which angle is an exterior angle?

Answers

Hello!

exterior angle + interior angle = 180°

- so 2 is an exterior angle

- so 7 is an exterior angle

so the answer is 2 because there is not 7

Let r₁(t)=⟨5,5,−16⟩+t⟨0,3,−2⟩ and r₂(s)=⟨−4,−7,1⟩+s⟨−3,0,3⟩. Find the point of intersection, P, of the two lines r₁ and r₂
P =

Answers

The required solution is P = ⟨5,29,-32⟩.We are supposed to find the point of intersection of two lines r₁ and r₂.For finding the point of intersection P, we can equate x, y and z coordinates of both the lines as shown below: x-coordinate of r₁(t) = 5+0t. And, x-coordinate of r₂(s) = -4-3s.y-coordinate of r₁(t) = 5+3t. And, y-coordinate of r₂(s) = -7+0s.z-coordinate of r₁(t) = -16-2t. And, z-coordinate of r₂(s) = 1+3s.

Given r₁(t)=⟨5,5,−16⟩+t⟨0,3,−2⟩ and r₂(s)=⟨−4,−7,1⟩+s⟨−3,0,3⟩.Now, we need to equate x, y, and z coordinates of r₁(t) and r₂(s) and solve them to get the value of s and t.5+0t = -4-3s => 3s = -9 => s = -35+3t = -7 => t = 8So, s = -3 and t = 8.Now, we can put the value of t or s in any of the equation to get the point of intersection of the two lines as shown below:r₁(8) = ⟨5,5,−16⟩+8⟨0,3,−2⟩ => ⟨5,29,-32⟩r₂(-3) = ⟨−4,−7,1⟩+(-3)⟨−3,0,3⟩ => ⟨5,29,-32⟩Therefore, the point of intersection, P, of the two lines r₁ and r₂ is P = ⟨5,29,-32⟩.

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