Complete the proof by choosing the correct "Reason".

using the power rule of logarithm, the value of a is 1.1021.

In the given question we have to determine a so that [tex]A(t)=A_{0}a^t[/tex] describes the amount of nitrogen-16 left after t seconds, where [tex]A_{0}[/tex] is the amount at time t=0.

The given exponential function is [tex]A(t)=A_{0}a^t[/tex].

The amount of nitrogen-16 is approximately 7.13 seconds.

According to the question, [tex]A(t)=A_{0}/2[/tex] and t = 7.13 seconds.

Putting the value in the given function;

[tex]A_{0}/2=A_{0}a^{7.13}[/tex]

Divide by [tex]A_{0}[/tex] on both side, we get

[tex]1/2=a^{7.13}[/tex]

Taking In on both side

[tex]\text{In}(1/2)=\text{In}(a^{7.13})[/tex]

Using the power rule of logarithm

In(1/2)=7.13In(a)

Divide by 7.13 on both side

In(a)= -0.693/7.13

In(a)= -0.0972

Taking exponential on both side

[tex]e^{\text{In}(a)}= e^{-0.0972}[/tex]

a = 1.1021

Hence, the value of a is 1.1021.

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The set of information that is true about the relation is:

Domain: {3, 4, 5, 6}

Range: {-8, -1, 2, 7}

The relation is not a function.

A relation that represents a function will have each of its domain elements related to exactly one range element.

All the x-values in a relation are referred to as the domain of a function, while all the y-values are called the range of the function,

Therefore, for a relation to be considered a function, a domain element must not correspond to two different range elements or related to two range elements.

Given the relation, {(3, 2), (5, −1), (6, 7), (3, −8), (4, 2)}:

The domain of the relation is: {3, 4, 5, 6}

The range of the relation is: {-8, -1, 2, 7}

The relation is not a function because the domain element, 3, corresponds to two different range elements, 2 and -8.

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The shape has a surface area of: Surface Area = 282.6 in²

The given parameter is represented on the figure

In this case, the figure is a cone with the following parameters

Radius, r = 5 inches

Height, h = 12 inches

The surface area of the cone is then calculated as

A = πr * (r + √(h² + r²))

Substitute the known values in the above equation, so, we have the following representation

A = 3.14 * 5 * (5 + √(12² + 5²))

Evaluate the expression

A = 282.6

Hence, the surface area is 282.6 square inches

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The equation of the line is ,y= -9x+5.

Acc to our question-,

We should use the slope-intercept formula to solve this problem.

The point-slope formula states:= [ y = mx + c]

Where m is the slope and c is the y-intercept for the point (0,y1)

Substituting the information provided we get the equation: y= -9x+5.

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A sequence of transformations maps ∆ABC to ∆A′B′C′. The sequence of transformations that maps ∆ABC onto ∆A′B′C′ is a reflection across the line x = -3 followed by a reflection across the line y = x.

Given that both triangles are congruent, we can infer or deduce that there were no dilations or contractions. Hence, since we are moving in a clockwise direction, we can submit that this was not a rotation but a reflection.

Hence the first sequence of reflection was such that:

∆ABC reflects onto ∆A′B′C′ across the line x = -3; followed by
a reflection across the line y = x.

Note that in geometry, reflection refers to the mirror image of an image. The line through which an image reflects is called the line of reflection.

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Answer:

a) He obviously used 7 liters of cooking oil.

b) He has 24 liters of cooking oil left.

The correct expression of the inequality expression is 18 ÷ 6 + 3 □ 6 + 12 ÷ 3

From the question, the expression is given as

18 ÷ 6 + 3 □ 6 + 12 ÷ 3

We start by converting the above expression to the same form

So, we start by solving the quotients

This gives

3 + 3 □ 6 + 4

Next, we evaluate the sum

So, we have

6 □ 10

In the above expression, we have

6 and 10

By convention, the number 6 is less than the number 10

This is so because 6 has a smaller value and 10 has a higher value

When the above numbers are compared, we have

6 is less than 10

This means that we make use of the inequality symbol <

So, we have

18 ÷ 6 + 3 < 6 + 12 ÷ 3

Hence, the complete inequality is 18 ÷ 6 + 3 □ 6 + 12 ÷ 3

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Answer:

1/2=0.5

Step-by-step explanation:

-2+4/5°-1=1/2

The critical points of the given inequality are; x=-6 and x=2

1) When the denominator is equal to zero, at that point, we will have a critical point.

We are given the inequality;

(2x + 5)/(x - 2) ≥ (x - 1)/(x - 2)

Thus, x - 2 = 0

x = 2.

Thus, x = 2 is a critical point

2) Simplify the numerator to get the expression such that p(x) ≥ 0 or p(x) ≤ 0.

Thus, at p(x) = zero, we have other critical point(s)

Multiply both sides by (x - 2) to get;

2x + 5 = x - 1

2x - x = - 1 - 5

x = - 6

Then, the two critical points are x = 2 and x = - 6.

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From the equation E(d) = 38d + 500, The initial electricity is 500W and the build up is 38W per day

An equation is an expression showing the relationship between two or more numbers and variables.

The standard equation of a straight line is:

y = mx + b

Where m is the rate of change and b is the y intercept

Let E represent the electricity from the solar panels after d days.

Since:

E(d) = 38d + 500

The y intercept is 500 and the slope is 38

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The total number of degrees the temperature changed in the 6 hours is 12°F

Here,

The temperature dropped 2°F every hour for 6 hours.

We have to find,

The total number of degrees the temperature changed in the 6 hours.

Fahrenheit is a scale for measuring temperature, in which water freezes at 32 degrees and boils at 212 degrees. It is represented by the symbol ° F.

Now,

The temperature dropped 2°F every hour for 6 hours.

1 hour =  2°F

6 hour = 6 x 2 = 12°F

Hence, The total number of degrees the temperature changed in the 6 hours is 12°F.

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1. 35 signed up for only mathematics

2. 20 signed up for only English

3. 85 or 70 is English or mathematics

4. Neither math or English is 45

5. English and Math is 50

1. How many signed for only mathematics

We have to define only mathematics as x

while we have math = m

English as E

Math and English as ME

only math

X = M - ME

= 85 - 50

= 35

2. Only English

E - ME

= 70 - 50

= 20

3. English or mathematics =

85 or 75

4. Neither English nor Mathematics

150 - (85 + 70 - 50)

= 45

5. The number for math and English is what is the intersection = 50

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Answer:

c

Step-by-step explanation:

cause -14w-3-(5w)

-14w-5w-3

-19w-3

Perimeter of triangle BCF is 19.24 units. Area of triangle BCF is 15 [tex]units^{2}[/tex].

Distance formula = [tex]\sqrt{(x1-x2)^{2}+(y1-y2)^{2} }[/tex]

Perimeter = a + b + c

Area = [tex]\sqrt{s(s-a)(s-b)(s-c)}[/tex]

      s = [tex]\frac{a+b+c}{2}[/tex]

Given, B(3,2), C(1,-2), F(-3,5).

BC = a  = [tex]\sqrt{(3-1)^{2} +(2+2)^{2} }[/tex]

            = [tex]\sqrt{2^{2} +4^{2} }[/tex]

            = [tex]\sqrt{4+16}[/tex]

            = [tex]\sqrt{20}[/tex]

            = 4.47 units

CF = b = [tex]\sqrt{(1+3)^{2} +(-2-5)^{2} }[/tex]

           = [tex]\sqrt{4^{2} +7^{2} }[/tex]

           = [tex]\sqrt{16+49}[/tex]

           = [tex]\sqrt{65}[/tex]

           = 8.06 units

BF = c = [tex]\sqrt{(3+3)^{2} +(2-5)^{2} }[/tex]

           = [tex]\sqrt{6^{2} +3^{2} }[/tex]

           = [tex]\sqrt{36+9}[/tex]

           = [tex]\sqrt{45}[/tex]

           = 6.71 units

Perimeter = a + b + c

                = 4.47 + 8.06 + 6.71

                = 19.24 units

s = [tex]\frac{a+b+c}{2}[/tex]

 = [tex]\frac{19.24}{2}[/tex]

 = 9.62

Area = [tex]\sqrt{s(s-a)(s-b)(s-c)}[/tex]

        = [tex]\sqrt{9.62(9.62-4.47)(9.62-8.06)(9.62-6.71)}[/tex]

        = [tex]\sqrt{9.62*5.15*1.56*2.91}[/tex]

        = [tex]\sqrt{224.91}[/tex]

        = 14.99

        ≈ 15  [tex]units^{2}[/tex]

Hence, perimeter is 19.24 units and area is 15  [tex]units^{2}[/tex].

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Answer:

-----------------------------

A and C are congruent angles opposite to congruent sides of the isosceles triangle.

Find the measure of ∠A

Answer:

The angle A is 55°.

Step-by-step explanation:

We know that,

→ <A = <C

Now the value of x will be,

→ 3x + 40 = x + 50

→ 3x - x = 50 - 40

→ 2x = 10

→ x = 10/2

→ [ x = 5 ]

Then the value of m<A is,

→ A = 3x + 40

→ A = 3(5) + 40

→ A = 15 + 40

→ [ A = 55° ]

Hence, the answer is 55°.

Answer:

0.13 km

Step-by-step explanation:

Rearrange the formula to solve for [tex]h[/tex]:

[tex]D(h)=111.7\sqrt{h}[/tex]

[tex]\frac{D(h)}{111.7}=\sqrt{h}[/tex]

[tex](\frac{D(h)}{111.7})^2=(\sqrt{h})^2[/tex]

[tex](\frac{D(h)}{111.7})^2=h[/tex]

Then, substitute the distance of 40 km:

[tex](\frac{40}{111.7})^2=h[/tex]

[tex]0.13\approx{h}[/tex]

Answer:

x=3

Step-by-step explanation:

Answer: x=3

Step-by-step explanation:

First, you need to subtract x and x by itself, and do the same with the 3x. Your equation should now look like 6 = 2x. Now, divide each side of the equation with 2, and now your equation should look like 3 = x!

-----------------------

So, to double check, replace the x's with 3. The equation should be 3 + 6 = 3(3). If you do the math, it equals 9 = 9!

No, the data provided does not give good evidence that ACME’s penetration rate for widgets is greater than 40%, Test at the

2.5% level of significance

P-value in the data is 40% and this refers to the probability that the assumed penetration rate is greater tan 40 %

The central limit theorem is frequently employed in situations when it is necessary to identify the features of the population but it is challenging to analyze the entire population.

The central limit theorem gives the formula

Z = (X - μ) / σ

Definition of variables

sample mean, X = 185

population mean, μ  = ?

standard deviation, σ = ?

sample size, n = 185

significance level = 2.5% = 0.025

confidence level = 1 - significance level = 1 -  0.025 = 0.975 = 97.5%

z score, z

Z score for 97.5% confidence level = 1.96

substituting into the formula

Z = (X - μ) / σ

The given variables are not enough for the calculation

population mean, μ  = ?

standard deviation, σ = ?

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The completion of the following accounting ratios is as follows:

A. Profit margin on net sales is 31.6%.

B. Acid test is 86.0%.

Accounting ratios enable financial analysts to understand the relative magnitude of one financial statement account to another.

By their nature, accounting ratios compare or represent an entity's financial performance or position in relative terms.

Current assets = $13,000

Inventory = $4,400

Current liabilities = $10,000

Net income = $7,700 Net sales = $24,400

The profit margin on net sales = Net Income ÷ Net Sales x 100

= $7,700 ÷ $24,400

= 31.6%

Acid Test Ratio = (Current Assets - Inventory) ÷ Current Liabilities

= ($13,000 - $4,400) ÷ $10,000

= 0.86

= 86%

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Answer:

B

Step-by-step explanation:

Combine 2x^2 and 3x^2 to get 5x^2.

Combine x and 2x to get 3x.

Add 3 and 1 to get 4.

Answer:

1.6 kg = $2.96

Step-by-step explanation:

The given statement is,

→ 1 kg of apple = $1.85

→ a = 1.85

Now the cost of 1.6 kg of apple is,

→ 1.6 × a

→ 1.6 × 1.85

→ $2.96

Hence, 1.6 kg of apple is $2.96.

Answer:

  Andrew failed to change the direction of the inequality

Step-by-step explanation:

You want to know the mistake in Anderw's work solving the inequality ...

  −4(x + 8) + 25 ≤ −2 + 1(x − 50)

−4(x + 8) + 25 ≤ −2 + 1(x − 50)

−4x − 32 + 25 ≤ −2 + 1x − 50

−4x − 7 ≤ 1x − 52

−5x ≤ −45

x ≥ 9

Andrew's mistake was failing to reverse the inequality symbol when dividing by a negative number (-5) at the last step.

__

Additional comment

The last steps of the solution could be written ...

  -5x ≤ -45

  45 ≤ 5x . . . . . . . add 5x+45 to both sides

  9 ≤ x . . . . . . . . . divide by 5 (no reversal of ≤ is needed)

Answer:

{-9,-8,7,8,10}

Vertex of g(x) is: (-2, -4)

acc to our question:

Vertex form of a quadratic function:

f(x) = (x - h)² + k

We have (h, k) = (3, -4)

The function f(x) is:

f(x) = (x - 3)² - 4

The function g(x) is: g(x) = f(x + 5) =

Vertex of g(x) is:(-2, -4)

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Answer:

1.3% decrease

Step-by-step explanation:

% change = (9.69 - 9.56) / 9.69) x 100 = 1.3% decrease

9.69-9.56 = 0.13

0.13/0.69= 0.0134158972

Multiply by 100 and you get 1.34158927

Round to nearest tenth and you get = 1.3%

Therefore, the percentage decrease is 1.3

The required equation  can be used to determine the pounds of laundry the customer brought in is A. 0.61x + 28.00 = 41.42

An equation is a mathematical expression that shows the relationship between two variables.

To find the given equation,

Let x be the number of pounds of clothes washed and folded at the laundromat.

Given that the laundromat will wash and fold clothes at $0.61 per pound for those customers with a laundry service, the total amount paid for the number of poundsof clothes is P = rate × number of pounds = $0.61 × x = 0.61x

Also, the laundromat has a wash-and-fold service for a monthly fee of $28.00.

So, the total amount paid is T = P + $28.00 = $0.61x + $28.00

Now, since one customer paid $41.42 in total for the month, since this is the total amount paid, then T = $41.42

So, $0.61x + $28.00 = $41.42

So, the required equation is A. 0.61x + 28.00 = 41.42

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Answer:

10, 17

Step-by-step explanation:

let the number be n then the other number is n + 7 and

n + n + 7 = 27

2n + 7 = 27 ( subtract 7 from both sides )

2n = 20 ( divide both sides by 2 )

n = 10

n + 7 = 10 + 7 = 17

the numbers are 10, 17

Answer:

Step-by-step explanation:

I believe that the volume of the rectangular prism is 512.

Explanation: V = whl = 8 · 8 · 8 = 512

V=Volume

W= Width

H= Height

L= Length

The length of the horizontal distance of the ramp if The entrance to Mrs. Giles's business is 28 inches higher than the parking lot in front of her store is 28 feet.

Comparing one quantity to another is what it is. For instance, the weight ratio is 1:3 if you weigh 30 kg and your father weighs 90 kg.

Given:

The ratio of vertical and horizontal distance = 1:12,

The vertical distance of  Mrs. Giles's business  = 28 inches,

If for every one unit of vertical distance, the ramp must have 12 units of horizontal distance, so or 28 inches vertical distance the horizontal distance would be = 28 × 12 = 336 inches,

([tex]1 feet = 12inches[/tex])

= 336 / 12 = 28 feet

Therefore, The length of the horizontal distance of the ramp if The entrance to Mrs. Giles's business is 28 inches higher than the parking lot in front of her store is 28 feet.

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Answer:

Step-by-step explanation:

1 and 2 are supplementary angles and hence sum to 180°.