2 years ago

Find the area of this semi-circle with radius, r = 75cm.Give your answer rounded to 1 DP.

Mathematics

1 answer:

lawyer [7]2 years ago

7 0

The area of this semi-circle with radius is 8831.3 square cm

<h3>How to find the area of this semi-circle with radius?</h3>

The radius is given as:

Radius, r = 75cm.

The area of this semi-circle with radius is calculated as:

A = 0.5 * πr^2

Substitute the known values in the above equation

A = 0.5 * 3.14 * 75^2

Evaluate

A = 8831.3

Hence, the area of this semi-circle with radius is 8831.3 square cm

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SAT math scores have a bell-shaped distribution with a mean of 515 and a standard deviation of 114.

nadezda [96]

Hey there mate :)

Analysis :

$401 = 515 - 114 = u - 6$

And

$173 = 515 - 3.114 = u - 36$

$= \frac{p(u - 36 < u < u + 36) - p(u - 6 < u < u + 6)}{2}$

$= \frac{99.73percent - 68.21percent}{2}$

$= \frac{31.46percent}{2}$

$= {15.73percent}$

Then, calculating,

$u - 26 = 515 - 2 \times 114 = 287$

And

$u + 26 = 515 + 2 \times 114 = 743$

Then,

$The \: Range = (287,743)$

Final Answers :-

15.73 %

(287,743)

~Benjemin360

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