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3 years ago

Stats homework I really need help please

Mathematics

1 answer:

OverLord2011 [107]3 years ago

4 0

Answer::

If the author assumes normal range is within one S.D. (5 years) then

the low normal is Average minus 5 and high normal is Average plus 5

Low = 20.2 - 5 = 15.2

High = 20.2 + 5 = 25.2

A normal chart shows that 68.27% of values lie with one standard deviation on either side of the mean

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adell [148]

Answer: A=351.68 cm²

Step-by-step explanation:

To find the area of the shaded region, we would subtract the area of the circle by the area of the inner circle.

Area of Circle

$A=\pi r^2$

$A=\pi (11)^2$

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Area of inner (white) circle

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$A=\pi (3)^2$

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Now that we have the area to the circle and inner circle, we would subtract to find the area of the shaded region.

$A=121\pi -9\pi$

$A=112\pi$

$A=351.68 cm^2$

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Olegator [25]

Answer: 19/22

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