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
+2
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Home » Mathematics » 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