The formula below gives A, the area of a circle with radius r.
A(r)=3.14r to the second power
To the nearest hundredth what is the value of A(6)?
A.)18.84
B.)37.68
C.)354.95
D.)113.04

Question

The formula below gives A, the area of a circle with radius r.
A(r)=3.14r to the second power
To the nearest hundredth what is the value of A(6)?
A.)18.84
B.)37.68
C.)354.95
D.)113.04

aaronandyson · Answer

Replace the "r" with 6?

maddyiscoolio · Answer

but then its like 0.523333 and that is not what its asking..

mathstudent55 · Answer

$\large A(r) = 3.14r^2$

is the formula of the area of a circle, where r is the radius.

$\large A(6)$ means the area of circle whose radius is 6.

To find the area, substitute r with 6 in the formula.

$\large A(6) = 3.14 \times 6^2$

mathstudent55 · Answer

First, find $6^2$.
Remember that an exponent (whole number 2 or more) means to multiply the base a number of times.
With exponent 2, you multiply the base by itself.
$6^2 = 6\times 6$
Once you do that multiplication, then multiply by 3.14

mathstudent55 · Answer

What do you get for the area?

mathmale · Answer

Once you obtain a result for the area, it's up to YOU to round off this result to the nearest hundredth.