Question

Suppose you have 76 feet of fencing to enclose a rectangular dog pen. The function A=38x-x^2 , where x = width, gives you the area of the dog pen in square feet. What width gives you the maximum area? What is the maximum area? Round to the nearest tenth as necessary.

a. width = 19 ft; area = 361 ft2

b. width = 38 ft; area = 760 ft2

c. width = 38 ft; area = 361 ft2

d. width = 19 ft; area = 1083 ft2

Answer 1

can u help @phi

Answer 2

is this calculus ?