
Mark M. answered 01/02/20
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
A = x(12- x2)
A = -x3 + 12x
A' = -3x2 + 12
0 = -3x2 + 12
-12 = 3x2
4 = x2
2 = x
Can you determine the area?