Change 65% into a decimal by moving the decimal point two places to the left. Then multiply .65 by 39 to get Your answer = A. 25.35 :)
The area of a circle is represented by the equation:

We know that the diameter is two times the radius: 
So if we know that the diameter of the circle is 24m, we can divide this by two in order to get the radius:
-->
So then we can plug this radius in to the equation for the area of a circle:


We are told to use 3.14 as pi, and not pi itself, so let's plug in 3.14 for pi:


Now we know that the area of this circle is 452.16 square meters.
we know that, denominator ≠ 0
16y² ≠ 0
y ≠ 0 is excluded value.