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laiz [17]
3 years ago
6

A rectangle has length 72 cm and it’s width 56 cm. The other rectangle has the same area as this one, but its width is 21 cm. Fi

nd the constant of variation.
Mathematics
1 answer:
Kryger [21]3 years ago
5 0

A = l*w

A = 72* 56

A= 4032


4032 = L*21

4032/21 =L

L =192


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208/600 as a decimal
Sidana [21]
Your answer is 002.884
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4 years ago
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Suppose the speeds of vehicles traveling on a highway are normally distributed and have a known population standard deviation of
ladessa [460]

Answer:

The margin of error for the confidence interval for the population mean with a 98% confidence level is 2.88 miles per hour.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.01 = 0.99, so z = 2.326

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Find the margin of error for the confidence interval for the population mean with a 98% confidence level.

M = 2.326*\frac{7}{\sqrt{32}} = 2.88

The margin of error for the confidence interval for the population mean with a 98% confidence level is 2.88 miles per hour.

5 0
3 years ago
Bill is trying to plan a meal to meet specific nutritional goals. He wants to prepare a meal containing rice, tofu, and peanuts
Novay_Z [31]

Answer:

11.33 cups

Step-by-step explanation:

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3 years ago
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Alla [95]

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The equation of the line would be y = 2x + 8

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In order to find the equation of the line, we first need to find the slope of the original line. We can do that by solving for y.

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y = 2x - 1/7

Now that we have a slope of 2, we know the new slope will be the same since parallel lines have the same slope. So we can use it along with the point in point-slope form to find the equation.

y - y1 = m(x - x1)

y - 4 = 2(x + 2)

y - 4 = 2x + 4

y = 2x + 8

8 0
4 years ago
A book has 400 pages. 75 of these pages have colour pictures. What fraction of the pages in the book have coloured pictures?
erastovalidia [21]
75 / 400 = 0.1875 = 18.75% = 3/16
7 0
3 years ago
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