if the circumference of a circle increases from 4 pi to 8 pi , what change occurs in the area ?
explanation : 2 π r 1 = 4 π = > r 1 = 22 π r 2 = 8 π > r 2 = 4 original area = 4 π ∗ 22 = 16 π new area = 4 π ∗ 42 = 64 π so the area quadruples . option a
divide(divide(power(multiply(const_pi, 8), const_2), multiply(const_pi, 4)), divide(power(multiply(const_pi, 4), const_2), multiply(const_pi, 4)))