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I don't know what it means please help

I don't know what it means please help-example-1
User Hjalpmig
by
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2 Answers

5 votes
the area of shaded region = area of big circle - area of small circle

area of big circle = pi x r x r
r = 32
3.14 x 32 x 32
=3215.36ft square

area of small circle = pi x r x r
=3.14 x 20 x 20
=1256ft square
= 3215.36 - 1256
=1959.36ft square
= 1959ft square

User Mshroyer
by
7.9k points
5 votes
The answer is 129 ft squared 
User Toringe
by
8.6k points

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