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3 votes
The function f(r) gives the area of a circle with radius r. It can be written in equation form as f(r) = 3.14r2. What is f(5)?

A. 28.14
B. 31.40
C. 246.49
D. 78.50

1 Answer

4 votes
It is 31.4 because you plug in the function of 5 into r
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