Stephanie throws a paper airplane off the roof of her school. Her classmates measure the plane’s height, in feet, after each second. The table shows some of her data.



T= 0, 1, 2, 3, 4


h(t)= 200, 208, 212, 212, 208



Find the equation for h(t), and use it to determine how long it will take the plane to hit the ground. Round to the nearest hundredth

Answer:

h ≈ 3.39

Step-by-step explanation:

V = πr^2h

h = V/πr^2

h = 154/ π · 3.8^2

h ≈ 3.39472

The equation of the line passing through the points (0, 1) and (2, -3) is y = -2x + 1.

The formula for equation of line is expressed as;

y = mx + b

Where m is slope and b is y-intercept.

First, we determine the slope of the line.

Given the two points are (0, 1) and (2, -3).

We can find the slope of the line by using the slope formula:

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Substituting the values, we get:

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

m = -4 / 2

m = -2

Using the point-slope form, plug in one of the given points and slope m = -2 to find the equation of the line.

Let's use the point (0, 1):

y - y₁ = m(x - x₁)

y - 1 = -2(x - 0)

y - 1 = -2x

y = -2x + 1

Therefore, the equation of the line is y = -2x + 1.

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To find the critical points of the function f(x,y) = x' + y - 6y - 3x + 9, we need to take the partial derivatives with respect to x and y and set them equal to zero.

∂f/∂x = -3 = 0

∂f/∂y = 1 - 6 = -5 = 0

So the system of equations is:

-3 = 0

-5 = 0

These equations have no solutions, which means there are no critical points for this function.

Therefore, the list of critical points is empty.
Hello! I'd be happy to help you find the critical points of the given function. The function is:

f(x,y) = x' + y - 6y? - 3x + 9

To find the critical points, we need to find the partial derivatives of the function with respect to x and y, and then set them equal to zero:

∂f/∂x = ∂(x' + y - 6y? - 3x + 9)/∂x
∂f/∂y = ∂(x' + y - 6y? - 3x + 9)/∂y

Now, let's calculate the partial derivatives:

∂f/∂x = 1 - 3
∂f/∂y = 1 - 12y

The system of equations is:

1. ∂f/∂x = 1 - 3 = 0
2. ∂f/∂y = 1 - 12y = 0

Now let's solve the system of equations:

1. 1 - 3 = 0 → -2 = 0 (this equation cannot be satisfied)

Since the first equation cannot be satisfied, there are no critical points for the given function.

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The stairs can be broken up into three rectangular prisms

The concrete that will be needed to form the stairs is 9.72 m ^3

To get the volume of concrete

Since they are 3

2.7 / 3

= 0.9

1.5 / 3

= 0.5

0.5 + 0.5

= 1

each width is 3.6m

The volume of each = 0.9 x 1.5 x 3.6 = 4.86

Volume 2 = 0.9 x 1.0 x 3.6 = 3.24

Volume 3 = 0.9 x 0.5 x 3.6 = 1.62

amount of concrete = 1.62 + 3.24 + 4.86

= 9.72 m ^3

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Answer:

I attached a graph to the problem, so you can better understand why there is no solution to the system of equations:

The graph of the two lines shows that the two lines are parallel lines and never intersect.  We know (even without writing the second equation in slope-intercept form) that parallel lines have the same slope and will never intersect, so the two lines have the same slope.  Graphically, a system of equations can only have a solution, when the two lines intersect at one point or intersect at infinitely many points.  Had the two lines had the same y-intercept, they would no longer be parallel lines, as they would overlap and thus would have infinitely many solutions.  Because this is not the case, there are no solutions to the system of equations.

There are 36 students in Ms. Oaks' class. The number of students who wear each type of item is: Glasses: 15 students, Earrings: 8 students, Hats: 4 students and Watch: 9 students

Let the total number of students in Ms. Oaks' class be x.

a) We know that 2/18 of the students wear hats, which is equivalent to 1/9 of the students. We are also told that 4 students wear hats. So, we can set up an equation:

1/9 * x = 4

Solving for x, we get:

x = 36

Therefore, there are 36 students in Ms. Oaks' class.

b) We can now use the information given to determine how many students wear each type of item.

- Glasses: 5/12 of the students wear glasses, which is equivalent to:

(5/12) * 36 = 15 students

- Earrings: 2/9 of the students wear earrings, which is equivalent to:

(2/9) * 36 = 8 students

- Hats: We are told that 4 students wear hats.

- Watch: 1/4 of the students wear a watch, which is equivalent to:

(1/4) * 36 = 9 students

Therefore, the number of students who wear each type of item is:

Glasses: 15 students

Earrings: 8 students

Hats: 4 students

Watch: 9 students

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The required answer to the algebraic fraction [ {(5)/(6)}a + 4 {(1)/(4)}a ] is [ {(11)/(6)}a ] .

We can simplify this algebraic fraction problem by simple rule of fraction addition and with application LCM rule as,

{(5)/(6)}a + 4 {(1)/(4)}a

= {(5)/(6)}a + (1)a

= [{ (5)+ (6) }/(6)]a

= {(11)/(6)}a

The LCM (or, Least Common Multiple) rule is used for the two algebraic fraction here as the value that is divisible by the two given numbers in the denominator of the algebraic fractions. Then by rule, the numerators are multiplied by the factor of LCM of the denominator and then the numerators are added.

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Modise is correct, as the input of 5 is mapped to the outputs of 2 and 9, hence the relation does not represent a function.

A relation represents a function if each value of the input is mapped to only one value of the output, that is, one input cannot be mapped to multiple outputs.

For a point in the standard format (x,y), we have that:

For this problem, there are two arrows departing the input of 5, meaning that the input of 5 is mapped to the outputs of 2 and 9, hence the relation is not a function.

The diagram is given by the image presented at the end of the answer.

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The technician will bill a total of 150 hours to the job. To find the total hours, we need to determine how many hours the technician will work during the first three weeks and the last three weeks, and then add them together.

1. First three weeks:

The technician will be 25% billable during these weeks. They work 40 hours per week, so we need to calculate 25% of 40 hours for each week:

25% of 40 hours = 0.25 * 40 = 10 hours per week

Since there are three weeks, we'll multiply these hours by 3:
10 hours/week * 3 weeks = 30 hours

2. Last three weeks:

The technician will be 100% billable during these weeks. They work 40 hours per week, so they'll bill 40 hours for each of these weeks:
40 hours/week * 3 weeks = 120 hours

3. Finally,

we need to add the hours from the first and last three weeks together to find the total hours the technician will bill to the job:
30 hours (first three weeks) + 120 hours (last three weeks) = 150 hours

The technician will bill a total of 150 hours to the job.

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the wire has uniform density, the center of gravity is located at the centroid of the quarter-circle, which is (4/3, 4/3).

The center of gravity (x¯,y¯) of the wire lies on the line of symmetry, which passes through the origin and the centroid of the quarter-circle.

The centroid of a quarter-circle with radius 6 is located at (4/3, 4/3) from the origin (as derived using calculus). Thus, the line of symmetry passes through the origin and (4/3, 4/3).

The equation of the line passing through two points (x1, y1) and (x2, y2) is given by:

(y - y1) / (x - x1) = (y2 - y1) / (x2 - x1)

Substituting (x1, y1) = (0, 0) and (x2, y2) = (4/3, 4/3), we get:

(y - 0) / (x - 0) = (4/3 - 0) / (4/3 - 0)

Simplifying, we get:

y = x

Therefore, the center of gravity (x¯,y¯) is located on the line y = x.

Since the wire has uniform density, the center of gravity is located at the centroid of the quarter-circle, which is (4/3, 4/3).

Hence, x¯=y¯=4/3.

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Answer:

x=137

Step-by-step explanation:

sqrt(x+7)=12

x+7=144

x=137

Part A: To convert the mixed fraction 5 9/17 to an improper fraction, we first multiply the whole number (5) by the denominator of the fraction (17), and then add the numerator (9). This gives us:

5 x 17 + 9 = 94

So 5 9/17 as an improper fraction is 94/17.

Part B: To find the decimal equivalent of 94/17, we divide the numerator (94) by the denominator (17) using a calculator or long division. The answer is approximately 5.53 when rounded to two decimal places.

Therefore, the decimal equivalent of the improper fraction 94/17 approximated to two decimal places is option B: 5.535.

The area of this irregular polygon is 344.5 square units.

To find the area of an irregular polygon, you can divide it into smaller, simpler shapes.

In this case, we can divide the polygon into a rectangle and a right triangle.

The rectangle has a height of 4 and a width of 13, so its area is 4 x 13 = 52 square units.

The right triangle has a base of 13 and a height of (110 - 4 x 13) / 2 = 45, since the total height of the polygon is 110.

Therefore, the area of the right triangle is (1/2) x base x height = (1/2) x 13 x 45 = 292.5 square units.

Adding the areas of the rectangle and the triangle, we get a total area of 52 + 292.5 = 344.5 square units.

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The radius of the cylinder with volume of 141.3and height of 7 cm is 2.53cm.

The formula for the volume of a cylinder is V = πr²h, where r is the radius and h is the height. Given that V = 141.3 cm³ and using π ≈ 3.14, we can solve for r.

Rearranging the formula, we get r² = V/(πh), and plugging in the given values, we get r² = 141.3/(3.14*7). Since we don't know the height of the cylinder, we cannot solve for r exactly.

However, we can say that the radius of the cylinder is proportional to the square root of the volume, the height is 7 cm, then r = √(141.3/3.14*7) ≈  2.53cm. If the height is different, the radius will change accordingly.

In summary, using the formula for the volume of a cylinder andheight of 7 cm, the radius of the cylinder with volume 141.3 cm³ and using π ≈ 3.14 is approximately 2.53 cm.

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Complete question:

The volume of the cylinder is 141. 3 cubiccentimeters. What is the radius of the cylinder given that height is 7cm? use  π ≈ 3.14

The total length of the string in feet is 6 feet, and the combined capacity of both water jugs in cups is 75 cups.

Step 1: To find the total length of the string in inches, Mara needs to add the lengths of the three pieces of string:

30 inches + 22 inches + 20 inches = 72 inches

So the total length of the string in inches is 72 inches.

Step 2: To convert inches to feet, we need to divide the number of inches by 12 (since there are 12 inches in a foot):

72 inches ÷ 12 = 6 feet

Therefore, once Mara puts together the three pieces of string, the total length will be 6 feet.

Step 1: To find out how many ounces of water both water jugs hold altogether, we need to add the capacity of the two jugs:

300 ounces + 300 ounces = 600 ounces

So both water jugs together can hold 600 ounces of water.

Step 2: To convert ounces to cups, we need to divide the number of ounces by 8 (since there are 8 ounces in a cup):

600 ounces ÷ 8 = 75 cups

Therefore, both water jugs together can hold 75 cups of water.

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The advertisement generates the maximum rate of growth of car sales on the first day.

The rate of growth of sales is given by the derivative of N(t) with respect to time t:

dN/dt = 72t

To find the day when the maximum rate of growth of sales occurs, we need to find the value of t that maximizes this expression.

Setting dN/dt = 0, we get:

72t = 0

t = 0

However, since we are interested in finding the day when the maximum rate of growth of sales occurs, we need to consider the second derivative of N(t):

d2N/dt2 = 72

Since this is a positive constant, it tells us that N(t) is a convex function and has a minimum value at t = 0. Therefore, the maximum rate of growth of sales occurs on the day when t = 0, which corresponds to the first day of the advertisement.

Answer: 1. on day 12

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A smaller MAD indicates less variability in the data set, while a larger MAD indicates greater variability.

The mean absolute deviation (MAD) is a measure of the variability of a set of data. It measures the average distance between each data point and the mean of the data set.

In this case, the MAD of Mr. Zimmerman's class is 0.46. This means that, on average, each data point in the class is about 0.46 units away from the mean of the data set.

The MAD gives an idea of how spread out the data is from the mean, regardless of whether the data is positively or negatively deviated from the mean.

A smaller MAD indicates less variability in the data set, while a larger MAD indicates greater variability.

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Place value is the value of a digit based on its position within a number system. To solve the equation 19 + 50, we use place value to add the digits in the ones and tens place.

Place value is a fundamental concept in mathematics that helps in understanding the value of digits in a number system. In the decimal system, each digit's value depends on its position relative to the decimal point, with the position to the left representing higher values than those to the right.

To solve 19 + 50, we add the digits in the ones place (9 + 0 = 9) and the digits in the tens place (1 + 5 = 6) separately, then combine the results to get the final answer of 69. This is possible due to the place value concept. The digit 9 in the ones place of 19 represents a value of 9 units, while the digit 1 in the tens place represents 10 units.

Similarly, the digit 5 in the tens place of 50 represents 50 units, and the digit 0 in the ones place represents 0 units. By adding the digits based on their place value, we get the answer 69, where 9 is in the ones place and 6 is in the tens place.

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The surface area of the hexagonal pyramid is 75240 square millimeters to the nearest square millimeter.

The surface area of the hexagonal pyramid can be calculated by finding the sum of the areas of its faces. The hexagonal pyramid has a base with six equal sides of length 44 millimeters, and six identical triangular faces with a height of 95 millimeters.

Each triangular face is an isosceles triangle, with two sides of length 44 millimeters and a base of length equal to the perimeter of the hexagonal base, which is 6 times 44 millimeters, or 264 millimeters.

To calculate the area of each triangular face, we can use the formula for the area of an isosceles triangle, which is (base x height) / 2. Substituting the values we have, we get: Area of each triangular face = (264 x 95) / 2 = 12540 square millimeters

Since the hexagonal pyramid has six identical triangular faces, we can multiply the area of one triangular face by 6 to get the total surface area of the pyramid: Total surface area = 6 x 12540 = 75240 square millimeters.

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The standard deviation for the prices paid for this particular model of car is $6,250.

Based on the figure you provided, we know that the data is normally distributed and approximately 68% of car buyers pay within one standard deviation of the mean, approximately 95% pay within two standard deviations, and approximately 99.7% pay within three standard deviations.

Since we know that 95% of the prices paid fall within two standard deviations of the mean, we can say that the distance between the mean and the upper or lower limit of this range is equal to two standard deviations. This is also known as the "95% confidence interval."

Therefore, to find the standard deviation, we can calculate the distance between the mean and either the upper or lower limit of the 95% confidence interval and then divide it by two.

From the figure, we can see that the 95% confidence interval extends from approximately $23,500 to $48,500. The midpoint of this interval is approximately $36,000, which we can take as the mean.

So, the distance between the mean and either end of the 95% confidence interval is:

$48,500 - $36,000 = $12,500

Dividing this by two gives us the standard deviation:

$12,500 / 2 = $6,250

Therefore, the standard deviation for the prices paid for this particular model of car is $6,250.

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The maximum profit is $3,900 if the marginal cost and marginal revenue are given by C'(x) = 20+ x/20 and R'(x) = 40 and fixed cost is $100.00.

In order to determine the maximum profit, we need to find the quantity (x) where the marginal cost (C'(x)) equals the marginal revenue (R'(x)). This is because when these two values are equal, we are maximizing the profit. The given functions are:

C'(x) = 20 + x/20
R'(x) = 40

First, set the marginal cost equal to the marginal revenue:

20 + x/20 = 40

Now, we need to solve for x:

x/20 = 40 - 20
x/20 = 20
x = 20 * 20
x = 400

So, the maximum profit occurs at a quantity of 400 units. To find the total cost (C(x)) and total revenue (R(x)), we need to integrate the marginal cost and marginal revenue functions:

C(x) = ∫(20 + x/20) dx = 20x + x^2/40 + C₁
R(x) = ∫40 dx = 40x + C₂

Since we have a fixed cost of $100, we know that C₁ = 100. We don't need C₂ to find the profit, as it will cancel out when we calculate it. Now, let's find the total cost and total revenue for 400 units:

C(400) = 20(400) + (400)^2/40 + 100 = 8000 + 4000 + 100 = 12100
R(400) = 40(400) = 16000

Finally, calculate the profit (P(x)):

P(x) = R(x) - C(x) = 16000 - 12100 = 3900

Therefore, the maximum profit is $3,900 when producing 400 units.

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Answer:

(14, -10)

Step-by-step explanation:

The correct option is (a)  270 degree clockwise rotation because they both result in the same final orientation, just in opposite directions.

A 90-degree counter-clockwise rotational  symmetry  is the same as a 270-degree clockwise rotation. This is because rotations are measured in degrees, and a full circle is 360 degrees. Therefore, rotating something 90 degrees counter-clockwise means turning it a quarter of a full circle, while a 270-degree clockwise rotation means turning it three-quarters of a full circle.

To visualize this, imagine a square with its sides parallel to the x and y axes. If we rotate this square 90 degrees counter-clockwise, its sides will now be parallel to the y and negative x axes.

However, if we rotate the same square 270 degrees clockwise, its sides will also be parallel to the y and negative x axes, as it has been turned three-quarters of the full circle in the opposite direction.

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The 95% confidence interval for the population mean difference in IQ test scores between Monday and Friday is (-6.174, -3.826) points. This indicates that we are 95% confident that the true mean difference falls within this range.

We can use the formula for the confidence interval of the mean difference in a repeated-measures study:

CI = MD ± t* SE

where MD is the sample mean difference, SE is the standard error for the mean difference, and t is the critical value from the t-distribution with n-1 degrees of freedom and a confidence level of 95%.

Substituting the given values, we get:

CI = -5 ± t(0.51)

We need to find the value of t. Since n = 9, we have 8 degrees of freedom. Using a t-table or calculator with a degrees of freedom of 8 and a confidence level of 95%, we find that t = 2.306.

Substituting t = 2.306, we get:

CI = -5 ± 2.306(0.51)

CI = -5 ± 1.174

Therefore, the 95% confidence interval for the population mean difference is (-6.174, -3.826). We can interpret this interval as follows: we are 95% confident that the true mean difference in IQ test scores taken on a Monday versus those taken on a Friday lies between -6.174 and -3.826 points.

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If John bought stock for $350 then A year later, he sold it for $385. So John's Return on investment is 10%.

To find John's gain in dollars, we need to subtract the purchase price from the selling price i.e. Gain = Selling price - The purchase price. So John's Return on investment is 10%.

Gain = $385 - $350

Gain = $35

So John's gain in dollars is $35.

To find John's return on investment (ROI), we need to use the formula:

ROI = (Gain / Investment) x 100%

We already know the gain is $35, and the investment is $350. Substituting these values into the formula, we get:

ROI = ($35 / $350) x 100%

ROI = 0.1 x 100%

ROI = 10%

So John's Return on investment is 10%. Rounded to the nearest whole percent, the answer is also 10%.

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Answer:

1 candy bar is $1.25

2 candy bars is $2.50

3 candy bars is $3.75

4 candy bars is $5

Equation:

y = 1.25x

y being the cost and x being number of candy bars

When comparing the values of f(4) and g(4), we need to take into account the fact that f(x) is exponential and g(x) is linear. Exponential functions grow at an increasing rate as x increases, while linear functions grow at a constant rate. Therefore, as x gets larger, the difference between f(x) and g(x) will become greater.

To find out how much greater f(4) is than g(4), we first need to calculate the values of f(4) and g(4). Let's say that f(x) = 2^x and g(x) = 3x + 1. Plugging in x = 4, we get:
f(4) = 2^4 = 16
g(4) = 3(4) + 1 = 13

So, f(4) is greater than g(4) by a difference of 3. However, this does not take into account the fact that f(x) is exponential and g(x) is linear.

To see the impact of the different growth rates, let's compare the values of f(x) and g(x) for a range of values of x. We can create a table to compare the two functions:

x    f(x)    g(x)
0    1       1
1    2       4
2    4       7
3    8       10
4    16      13
5    32      16

From this table, we can see that as x increases, the difference between f(x) and g(x) grows at an increasing rate. This is because f(x) is growing exponentially, while g(x) is growing linearly.

In summary, f(4) is 16 and g(4) is 13, so f(4) is greater than g(4) by a difference of 3. However, we also need to take into account the fact that f(x) is exponential and g(x) is linear. As x increases, the difference between f(x) and g(x) will grow at an increasing rate. Therefore, the difference between f(4) and g(4) is not only 3, but also growing exponentially.

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Answer :

Step-by-step explanation:

We are give with a rectangle MNOP.

As we can see from above graph,

Length of MN = 8 units

Length of MO = 6 units

We know that

area = 8 × 6

area = 48 sq. units

Now, Let's calculate the perimeter of the rectangle.

Substituting the values,

Perimeter= 2(8 + 6)

Perimeter = 2 × 14

Perimeter = 28 units

The percent error is 4.76%.

To find the percent error, we first need to calculate the actual error, which is the absolute difference between the estimated points and the actual points:

Actual error = |252 - 240| = 12

Next, we need to calculate the percent error, which is the ratio of the actual error to the estimated value, expressed as a percentage:

Percent error = (actual error / estimated value) x 100%

Percent error = (12 / 252) x 100%

Percent error = 4.76%

Therefore, the percent error is 4.76%.

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If the system includes the inequality y < 0, then the shaded region would be below the x-axis (in the third and fourth quadrants).

The solutions to a system of linear inequalities can be graphed on a coordinate plane to form a shaded region.

The shaded region would be in the quadrant(s) that satisfies all the inequalities in the system. For example, if the system of inequalities includes the inequality x > 0, then the shaded region would be on the right-hand side of the y-axis (in the first and fourth quadrants).

If the system includes the inequality y < 0, then the shaded region would be below the x-axis (in the third and fourth quadrants).

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