Question 307719
The formula for the surface area of a sphere is A=4*pi*r^2.
 A square sticker of side x if placed on a ball of radius 3x. 
What is the surface area of a sphere not covered by the sticker?
 We must answer in a factored form.
:
S.A = {{{4*pi*(3x)^2 - x^2}}}
:
S.A = {{{4*pi*9x^2 - x^2}}}
:
S.A = {{{36*pi*x^2 - x^2}}}
:
S.A = {{{x^2(36*pi - 1)}}}