circle area = pi * radius^2
if diameter = 10 then radius = 5
circle area = pi * 5^2
circle area = pi * 25
circle area = 78.5398163397 square units
step-by-step explanation:
to determine the unit cost your would divide the total cost by the number sold.
7 bagels for $4.41 $4.41/7 = $.63 each at fresh side
5 bagels for $3.60 $3.60/5 = $.72 each at value mart