A shoe manufacturer has the marginal cost function MC(x)=20-0.02x, 0 (in dollars per pair), where x is the number of pairs of shoes produced each week. The fixed cost is $900. Determine the total cost of producing 250 pairs of shoes.

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet