Question 274512
Sarah bought a circular marble table top...its 12 ft in diameter. at $90 per square yard how much did sarah pay for the table top?

solution 
you need to find the area of the table for it.
if diameter = 12ft, radius = 6ft
area = pi*r^2
     = 3.14*6^2
     = 3.14*36
     = 113.04 ft^2

now, to find how much sarah paid, $90*113.04
    = $10,173.6
     =