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ArbitrLikvidat [17]
2 years ago
4

a rectangle door sign has an area of 577.6 square centimeters the length of the sign is 38 centimeters what is the width

Mathematics
1 answer:
Yakvenalex [24]2 years ago
4 0
The formula for the area of a rectangle is l * w = a. So let's plug the values that we know in: 
38w = 577.6. We can solve this equation by following these steps: 
Divide each side by 38 to isolate the variable.
557.6 divided by 38 is 15.2.
We can check this by multiplying 15.2 by 38. 
So the width is 15.2
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Jack is driving from his house to the airport. At 9:00 AM, he is 150 miles from the airport. At 10:30 AM, he is 75 miles from th
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I b3live it is 50 miles/hour

Step-by-step explanation:

We need to know how many miles he drove from 9:00 to 10:30 so you do 150-75 which is 75. Then, you do 75÷1.5 because 9:00 and 10:30 are an hour and a half apart and then you get 50 mph.

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Rip van Winkle fell asleep for a very long time. When he fell asleep, his beard was 8 millimeters long, and each passing week it
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L(w) = 8 mm + (2 mm/wk)(wk)

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L(w) = length of beard as a function of time in weeks

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2 years ago
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An exterior angle of an isosceles triangle has measure 130°. Find two possible sets of measures for the angles of the triangle.
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(1) it can be both exterior of vertex or base. 180-130=50°
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base is 50°:       vertex= 180-2*50=80°

vertex 50 base 65; vertex 80, base 50

(2)base=180-130=50°
vertex=180-2*50=80°

base 50 vertex 80
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The ratio of length to width in a rectangle is 3 to 1. If the perimeter of the rectangle is 128 feet, what is the length of the
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According to a report in USAToday, more and more parents are helping their young adult children get homes. Suppose eight persons
Inga [223]

Answer:

a)  95% confidence interval for the population proportion of all young adults in Kentucky who received help from their parents.

( 0.0761 , 0.3239)

b) Margin of error  =  0.1264.

Step-by-step explanation:

<u>Explanation</u>:-

Given '8' persons in a random sample of 40 young adults who recently purchased a home in Kentucky received help from their parents.

sample proportion of success 'p' = \frac{8}{40} = 0.2

q = 1=p

q = 1-0.2 = 0.8

a)

95% confidence interval for the population proportion of all young adults in Kentucky who received help from their parents.

(p-1.96\sqrt{\frac{pq}{n} } , p+1.96\sqrt{\frac{pq}{n} } )

(0.2-1.96\sqrt{\frac{0.2X0.8}{40} } , 0.2+1.96\sqrt{\frac{0.2X0.8}{40} } )

(0.2 - 0.1239,0.2+0.1239)

( 0.0761 , 0.3239)

b) the margin of error for a 95% confidence interval for the population proportion.

For the 95% confidence interval ∝= 0.05 and zₐ = 1.96≅2.

Margin of error = \frac{2\sqrt{pq} }{\sqrt{n} }

Margin of error = \frac{2\sqrt{0.2X0.8} }{\sqrt{40} }

Margin of error for a 95% confidence interval for the population proportion.

Margin of error  =  0.1264.

4 0
2 years ago
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