If the pattern shown below in the stacks of cubes continues, how many cubes will be contained in the 99th stack?
The cubes in the firts stack have 3
The cubes in the secod stack have 9
The cube in the third stack have 27
Q1=3. r=. 3

Answer: the answer is b, -30.

The first derivative of the function h is given by [tex]h'(x)= x^4 - x^3 + x[/tex]. The graph of h is concave down at (−∞,−0.455). Therefore the correct answer is option D.

Given, the first derivative of the function,

[tex]h'(x)=x^{4} -x^{3} +x[/tex]

The second derivative of the function,

[tex]h''(x)=4x^{3} -3x^{2} +1[/tex]

When h''(x)<0, then the function is said to be concave down.

h′′(x)<0

=> [tex]4x^{3} -3x^{2} +1 < 0[/tex]

Finding the root of the equation,

[tex]f(x)=4x^{3} -3x^{2} +1=0[/tex]

This equation has only one real solution,

At x = -0.5, f(−0.5)<0

f(-0.5)<0

At x = -0.4, f(−0.4)>0

f(-0.4)>0

So according to the intermediate value theorem, there is a root in (-0.5, -0.4)

From the option, that root can be x = -0.455

So if the function concave down h''(x) < 0

Interval : (−∞,−0.455)

Therefore, the graph of h is concave down at (−∞,−0.455).

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Answer:

50 calculators and 10 calendars.

Step-by-step explanation:

Part A: Let x be the number of calculators and y be the number of calendars ordered. Then we have the following system of equations:

x + y = 60 (the total number of items ordered is 60)

12x + 10y = 700 (the total cost of the order is $700)

Part B: To solve this system by substitution, we can isolate x from the first equation and substitute it into the second equation. This gives us:

x = 60 - y

12(60 - y) + 10y = 700

Simplifying and solving for y, we get:

720 - 12y + 10y = 700

-2y = -20

y = 10

Therefore, the number of calendars ordered is 10. To find the number of calculators ordered, we can plug in y = 10 into the first equation and get:

x + 10 = 60

x = 50

Therefore, the number of calculators ordered is 50.

The probability that a randomly selected light bulb will last for more than 900 hours is approximately 0.0228 or 2.28%. The probability that a randomly selected box of this cereal weighs less than 15 ounces is approximately 0.0228 or 2.28%.

Solution 1 :-

We can use the standard normal distribution to answer this question by finding the z-score for a lifespan of 900 hours and then finding the corresponding probability.

z = (x - μ) / σ

where:

x = lifespan we want to find the probability for = 900 hours

μ = mean lifespan = 800 hours

σ = standard deviation = 50 hours

Plugging in the values, we get:

[tex]z = (900 - 800) / 50 = 2[/tex]

We discover that the probability associated with a z-score of 2 is around 0.0228 using a conventional normal distribution table or calculator.

Solution 2:

We can use the standard normal distribution to answer this question by finding the z-score for a weight of 15 ounces and then finding the corresponding probability.

z = (x - μ) / σ

where:

x = weight we want to find the probability for = 15 ounces

μ = mean weight = 16 ounces

σ = standard deviation = 0.5 ounces

Plugging in the values, we get:

[tex]z = (15 - 16) / 0.5 = -2[/tex]

We discover that the probability associated with a z-score of -2 is around 0.0228 using a basic normal distribution table or calculator.

The study of the possibility or chance of an event occurring is the focus of the mathematic branch known as probability.  It is a measure of how likely it is for an event to occur, ranging from 0 to 1, with 0 indicating that the event will never occur and 1 denotes that the event will always take place.

Probability can be expressed in different ways, such as fractions, decimals, or percentages. It is often used in various fields such as science, economics, and finance, to make predictions and informed decisions based on the available data. Probability is essential in statistical analysis, where it is used to calculate the likelihood of certain outcomes, test hypotheses, and make predictions.

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Complete Question:-

Ask your two questions in each of the two cells below, and provide the entire operation using probability statement(s) needed to calculate the answer to the question you've come up with. for example, if you ask what is the probability that (using the example from hw9) a basketball player makes a 2-point shot when defended, you would find:

Question 1: A company produces light bulbs and claims that they have a mean lifespan of 800 hours with a standard deviation of 50 hours. What is the probability that a randomly selected light bulb will last for more than 900 hours?

Question 2: A grocery store sells a certain brand of cereal and claims that the weights of the boxes follow a normal distribution with a mean of 16 ounces and a standard deviation of 0.5 ounces. If a customer selects a box at random, what is the probability that it weighs less than 15 ounces?

5^2 is equal to 25.
lol its kinda easy

Answer:

25.

Step-by-step explanation:

The symbol "^" representa exponents.

The exponet (second number) means how many times you mutiply 5 by itself. In this case, it's 2.

2. 5 x 5 = 25

Could you possibly repost your question with a clear image?

The details on this image are unreadable and, therefore, make it difficult to help.

Will bookmark this question so I can find your new post if posted again.

If there is enough evidence to reject the null hypothesis and conclude that the new process produces less than 90% good product.

The appropriate hypotheses for this scenario would be:

Null hypothesis (H0): The true proportion of good product produced by the new process is equal to or less than 0.9.
Alternative hypothesis (Ha): The true proportion of good product produced by the new process is greater than 0.9.

To test these hypotheses, we can use a one-sample proportion test. The test statistic for this test is calculated using the formula:

z = (p - P0) / sqrt(P0 * (1 - P0) / n)

where:
- p is the proportion of good product in the sample (0.87 in this case)
- P0 is the hypothesized proportion of good product (0.9)
- n is the sample size (49)

Using an alpha level of 0.05, we can find the critical z-value from a standard normal distribution table. For a one-tailed test (since our alternative hypothesis is one-sided), the critical z-value is 1.645.

Calculating the test statistic using the formula above, we get:

z = (0.87 - 0.9) / sqrt(0.9 * 0.1 / 49) = -1.17

Since the calculated z-value (-1.17) is less than the critical z-value (1.645), we fail to reject the null hypothesis. This means that we do not have enough evidence to conclude that the true proportion of good product produced by the new process is greater than 0.9. The quality manager should investigate the process further to improve the proportion of good product before certifying it.

Let's formulate the appropriate hypotheses and test them using an alpha:

The quality manager at Newvis Pharmaceutical Company wants to ensure that the new process produces at least 90% good product. We can define the null hypothesis (H0) and the alternative hypothesis (H1) as follows:

H0: p ≥ 0.90 (The process produces 90% or more good product)
H1: p < 0.90 (The process produces less than 90% good product)

Now, let's test these hypotheses using an alpha (significance level), which is typically set at 0.05.

1. Calculate the test statistic using the sample proportion (p-hat) and sample size (n):
p-hat = 0.87 (87% of the 49 containers were good)
n = 49

2. Find the standard error of the sample proportion:
SE = √(p * (1-p) / n)

3. Calculate the z-score:
z = (p-hat - p) / SE

4. Compare the z-score to the critical value from the z-table corresponding to the chosen alpha level. If the z-score is less than the critical value, reject the null hypothesis in favor of the alternative hypothesis.

If you complete these steps, you can determine if there is enough evidence to reject the null hypothesis and conclude that the new process produces less than 90% good product.

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The value of the test statistic is -8.2542.

We have,

p'= 0.87, p= 0.93 and n= 1232

We know, the equation for the Test statistic for a population proportion  is mathematically given as

z = (p' - p)/ √p(1-p)/ n

So, z= (0.87 - 0.93)/ √0.93(1-0.93)/ 1232

z = (-0.06) / 0.007269

z = -8.2542

So, the value of the test statistic is -8.2542.

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Answer:you need to multiply and ur answer u would get is 64

Step-by-step explanation: multiply 4x16 and you get ur answer.

Answer: 5400

Step-by-step explanation:

For a cube V=lwh

Volume for the larger box = 4.5 x 5 x 3.75 =84.375 or 675/8

Volume for smaller box =.25 x .25 x .25 = .015625 or 1/64

divide the larger by smaller.

84.375/.015625=5400

or

[tex]\frac{675}{8} /\frac{1}{64}[/tex]   keep change flip = [tex]\frac{675}{8} * \frac{64}{1}[/tex] = 5400

For the first expression, the order of operation is multiplication followed by subtraction and addition,  -5.56.For the second expression, the order of operations is multiplication followed by addition,  -0.9.

The addition is a mathematical operation that involves combining two or more numbers or quantities to find their total or sum. It is typically represented by the plus sign (+) and is one of the fundamental arithmetic operations. Addition is commutative, meaning that the order of the numbers being added does not affect the result.

For the first expression:

Operations:

Multiplication: 1.2 x (-1.3)

Subtraction: 1.2 x (-1.3)

Addition: 1.2 x (-1.3) + 4

Order of operations:

Multiplication: 1.2 x (-1.3) = -1.56

Subtraction: -1.56 - 4 = -5.56

For the second expression:

Operations:

Multiplication: 2 x 2.5

Addition: -3.5 - 1.4 + (2 x 2.5)

Order of operations:

Multiplication: 2 x 2.5 = 5

Addition: -3.5 - 1.4 + 5 = -0.9

Therefore, For the first expression, the order of operation is multiplication followed by subtraction and addition,  -5.56.For the second expression, the order of operations is multiplication followed by addition,  -0.9.

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The minimum dimensions of the rectangle are 6cm and 19 cm

The formula for calculating the perimeter of a rectangle is expressed as;

P = 2(l + w)

Such that the parameters of the formula are;

From the information given, we have that;

Perimeter of the rectangle is = 50 centimeters

length of the rectangle = 3w - 1

Substitute the values

50 = 2(3w + 1 + w)

expand the bracket

50 = 2(4w + 1)

50 = 8w + 2

collect like terms

8w = 548

w = 6 centimeters

Length = 19 centimeters

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The equation of transforming the function h(x) to y = h(x - 3) is h(x - 3) = -1/2(x - 3)² + -1/2(x - 3) + 4

The graph h(x) is a quadratic function

A quadratic function is represented as

y = ax² + bx + c

Where c = y when x = 0

So, we have

y = ax² + bx + 4

Using the other points, we have

a + b + 4 = 3

4a + 2b + 4 = 1

So, we have

a + b  = -1

4a + 2b = -3

When solved, we have

a = -1/2 and b = -1/2

So, the equation is

y = -1/2x² + -1/2x + 4

Rewrite as

h(x) = -1/2x² + -1/2x + 4

When translated to h(x - 3), we have

h(x - 3) = -1/2(x - 3)² + -1/2(x - 3) + 4

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The system of linear equations represented by the graph are y=2x-1 and y= -x+2.

A system of linear equations consists of two or more equations made up of two or more variables such that all equations in the system are considered simultaneously. The solution to a system of linear equations in two variables is any ordered pair that satisfies each equation independently.

Given that,

The coordinates on the blue line are (2, 3) and (0, -1)

The coordinates on the red line are (2, 0) and (0, 2)

Equation of a line with (2, 3) and (0, -1)

Now, m=(y₂-y₁)/(x₂-x₁)

= (-1-3)/(0-2)

= 2

Substitute m=2 and (x, y)=(2, 3) in y=mx+c, we get

3=2(2)+c

c=-1

Substitute m=2 and c=-1 in y=mx+c, we get

y=2x-1

Equation of a line with (2, 0) and (0, 2)

Now, m=(y₂-y₁)/(x₂-x₁)

= (2-0)/(0-2)

= -1

Substitute m=-1 and (x, y)=(2, 0) in y=mx+c, we get

0= -1(2)+c

c=2

Substitute m=-1 and c=2 in y=mx+c, we get

y= -x+2

Therefore, the system of linear equations represented by the graph are y=2x-1 and y= -x+2.

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The probability that the students teacher selects are both boys is equal to 5/32 (fraction in the simplest form).

Number of girls in Math's class of 7th grade = 3

Number of boys in Math's class of 7th grade = 5

Number of girls in Math's class of 8th grade = 9

Number of boys in Math's class of 8th grade = 3

There are a total of 8 students in the seventh grade

And 12 students in the eighth grade,

For a total of 20 students in the class.

The probability of selecting a boy from the seventh grade is 5/8,

since there are 5 boys out of a total of 8 students in the seventh grade.

The probability of selecting a boy from the eighth grade is 3/12,

since there are 3 boys out of a total of 12 students in the eighth grade.

To find the probability of selecting a boy from both grades, we multiply the two probabilities,

= (5/8) x (3/12)

= 15/96

= 5/32 (fraction in the simplest form)

Therefore, the probability of selecting a boy from the seventh grade and a boy from the eighth grade is 5/32.

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The statement "the confidence interval formula for a sample size is the same as the sample size formula for a mean" is false because they serve different purposes and cannot be used interchangeably.

The formula for a confidence interval depends on several factors, including the sample size, the level of confidence, and the standard deviation of the sample. The formula for a confidence interval for a mean is:

Confidence interval = sample mean ± (t-value) x (standard error)

where the t-value is based on the level of confidence and the degrees of freedom, and the standard error is the standard deviation of the sample divided by the square root of the sample size.

In summary, while both formulas involve the sample size and are used in statistical analysis, the confidence interval formula and the sample size formula for a mean are distinct and cannot be used interchangeably.

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Answer:

Total cost of attending university per year: $22,700

Parent's will pay half of it: ?

To know half of the number, we divide it by 2.

= $22,700 ÷ 2 = $11,350

Parents will pay: $11,350

Academic scholarship will pay: $8,300

= $11,350 - $8,300 = $3,050

So, The student have to save a total of $3,050.

To know how much she would need ro save every month, we would divide $3,050 by 12.

= $3,050 ÷ 12 = $254.15

The student Parents will pay $11,350. The student needs to save a total of $3,050 to pay the remaining cost. If the student chose to pay the needed amount in 12 months, then he/she would save $254.15 every month.

to get the slope of any straight line, we simply need two points off of it, let's use those two in the picture below

[tex](\stackrel{x_1}{-2}~,~\stackrel{y_1}{5})\qquad (\stackrel{x_2}{2}~,~\stackrel{y_2}{1}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{1}-\stackrel{y1}{5}}}{\underset{\textit{\large run}} {\underset{x_2}{2}-\underset{x_1}{(-2)}}} \implies \cfrac{-4}{2 +2} \implies \cfrac{ -4 }{ 4 } \implies - 1[/tex]

The number which we increase by 15 percent gives 356.5 is the number

Given that,

if we increase a number by 15 percent, we get 356.5

Let x be the unknown number.

Then the given statement can be numerically written as,

x + (15% of x) = 356.5

x + (15/100) of x = 356.5

x + 0.15x = 356.5

1.15x = 356.5

Dividing both sides by 1.15, we get,

x = 356.5 / 1.15 = 310

Hence the unknown number is 310.

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The minimum possible value of the objective function is -36

From the question, we have the following parameters that can be used in our computation:

Objective function, F = 8x - 3y

The coordinates of the feasible region are

(5, 5), (0, 8). (0, 12), (10, 0) and (15, 0)

Substitute (5, 5), (0, 8). (0, 12), (10, 0) and (15, 0) in the above equation, so, we have the following representation

F(5, 5) = 8(5) - 3(5) = 25

F(0, 8) = 8(0) - 3(8) = -24

F(0, 12) = 8(0) - 3(12) = -36

F(10, 0) = 8(10) - 3(0) = 80

F(15, 0) = 8(15) - 3(0) = 120

The minimum value above is -36 at (0, 12)

Hence, the minimum possible value of the objective function is -36

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Answer:

4[tex]a^{9}[/tex][tex]b^{8}[/tex]

Step-by-step explanation:

[tex]\frac{8a^{6}b^{12} x 4a b^{3} }{8x^{-2}b^{7} }[/tex]

[tex]\frac{32a^{7} b^{15} }{8a^{-2} b^{7} }[/tex]

4[tex]a^{9}[/tex][tex]b^{8}[/tex]

Helping in the name of Jesus.

The correct option is the second one, because it contins the point (0, 0.5), thus, the initial value is 0.5

For any function.

y = f(x)

We define the initial value as the value that y takes when we evaluate it in x = 0.

y = f(0) is the initial value, and it is represented by the pointy (0, y).

So a function will have an initial value of one-half if it contains the point (0, 0.5)

From the given options, the only one that conatins it is the second option "On a coordinate plane, an exponential function approaches y = 0 in quadrant 2 and increases into quadrant 1. It goes through (negative 1, 0.1), (0, 0.5), (1, 2.5)."

So that is the correct one.

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Alice's shortest height is 1.25 feet.

To determine Alice's shortest height, we need to examine the ratios given.

The ratio of her original height to her second height is 24:5, her second height to her third height is 1:12, and her original height to her fourth height is 16:1. We are told that the tallest height is 10 feet.
Since the tallest height is 10 feet, and the ratio of her original height to her fourth height is 16:1, we can find her original height: (10 feet / 1) * 16 = 160 feet. Now that we have her original height, we can find her second and third heights using the other given ratios:
Second height: (160 feet / 24) * 5 = 33.33 feet
Third height: 33.33 feet * 12 = 400 feet

Summary: Among the four heights (160 feet, 33.33 feet, 400 feet, and 10 feet), the shortest height is 10 feet (fourth height). However, since the question asks for her shortest height not mentioned as the tallest, it would be her second height, which is 33.33 feet. After reevaluating the ratios, Alice's original height should be 30 feet, making her second height 1.25 feet (30 / 24 * 5), which is the correct shortest height.

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The equation for the line of symmetry for the function defined by f(x) =-3x² +6x - 9 is x = 1.

Given the function in the question;

f(x) = -3x² + 6x - 9

To find the equation for the line of symmetry, we need to use the formula:

x = -b/2a,

Where a and b are the coefficients of x² and x in the quadratic equation, respectively.

Given the function:

f(x)= -3x² +6x - 9

We have:

a = -3 and b = 6.

Hence, the equation for the line of symmetry is:

x = -b/2a

x = -6 / ( 2(-3))

x = -6/(-6)

x = 1

The equation for the line of symmetry is x = 1.

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Answer: c

Step-by-step explanation: I'm pretty sure this is right

The table should be completed by writing each part of the exponential function as follows;

Geometric sequence        Exponential function      Mathematical meaning

gₙ                                             f(x)                                  dependent variable

g₁/r                                            a                                    coefficient of power

r                                                b                                    base of power

n                                               x                 independent variable (exponent)

In Mathematics, the nth term of a geometric sequence can be calculated by using this mathematical expression:

aₙ = a₁rⁿ⁻¹

Where:

In Mathematics, an exponential function can be represented or modeled by using the following mathematical equation:

[tex]f(x) = a(b)^x[/tex]

Where:

By comparison, we have:

gₙ  = f(x) (dependent variable)

g₁/r = a (coefficient of power)

r = b (base of power).

n = x (independent variable or exponent).

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Answer:

28 quart jars

Step-by-step explanation:

We know that there are 4 quarts in a gallon.

7 gallons * 4 quarts/gallon = 28 quarts

She needs 28 quart jars

There are 7098 possible ways of grouping 4 students, where there will be 2 juniors and 2 seniors, by using combinations.

There are 14 juniors and 13 senior in the service club and the club is to send four representatives to the state conference.

The members of the club decide to send 2 juniors and 2 seniors of the club for the state conference. There is no specified order of how to form the groups.

Thus we apply the formula of combinations to calculate the total number of different groupings of 4 students that is possible since order does not matter in combinations = nCr

where, n is the total number of students and r is the required number of students from the total.

Applying formula of combinations,

Total number of possible groupings = (14C2)*(13C2)

Here, 14C2 calculates the number of ways juniors can form groups and 13C2 calculates the number of ways seniors can form groups.

⇒ Total number of possible groupings = [ 14!/{(14-2)!*2!}]* [ 13!/{(13-2)!* 2!}]

= 7098

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