Which go together will reward brainliest

We need to solve for the radius. So using the "formula" for the surface area, we have

900*pi ft^2 = 4*pi*r^2       divide by pi

900 ft^2 = 4*r^2    divide by 4

225ft^2 = r^2         take the square root of each side

15 ft = r

This should give you tools to answer all the questions.  

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175