What is the area of a circle with a diameter of 24 meters (use 3.14 for pi)?

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.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9