Problema Solution
The radius of a circle is (x − 10) ft. Find the area of the circle in terms of the variable x. Leave the answer in terms of π.
Answer provided by our tutors
Let
r = (x - 10) the radius of a circle
A = π*r^2 the area of the circle
A = π*(x - 10)^2 = π*(x^2 - 20*x + 100)
A = π*x^2 - 20*π*x + 100*π