The area of the circle is given as:

Plugging the value of the radius we have that:

Therefore the area in terms of pi is:
You only have the % and you need the number. For example i got a 87% on my Math test what is that as a decimal? The answer is 0.87 because you move the decimal ahead 2 numbers.
If you add each cost together the price is 47.45
Hope this helps :)
Answer:
Step-by-step explanation:
<u>Sum of interior angles of a polygon:</u>
- (n - 2)180 = 160n
- 180n - 360 = 160n
- 20n = 360
- n = 18