Answer:
50.2 square cm
Step-by-step explanation:
Diameter = 8 cm
Radius = 8/2 = 4 cm
50.62=51
A=pi*r^2
=3.14*(4^2)
=50.62=51
-2(7-15) / 4
-2(-8) = 16
16/4 = 4
Answer is 4