Question

A(r) is a function that gives the area of a circle with radius r. it can be written in equation form as A(r)=3.14r^2. what is the value of A(3)
A.18.84
B.28.26
C.88.74
D.12.14

Answer 1

Simple...

you know A(r)=3.14$r^{2}$

It's just telling you what is the answer when r=3?-->>>

$A(3)=3.14*3^{2}$

A(3)=3.14*9

A(3)=28.26

Thus, your answer, B.

Answer 2

Answer:

B.28.26

Step-by-step explanation: