The area of a circle is 706.5 square inches. What is the radius? Use 3.14 to approximate pi.

What you know is

area=706.5in^2

formula is 3.14*r*r

what to do is set up an equation

706.5=3.14*r*r

after you divide both sides by 3.14 to cancel it out your left with

225=r^2

then you would take the root of both sides to get

r = 15, - 15