The Cost of Having Specialty T-Shirts Made Depends on the Number

Multiple Choice

The cost of having specialty T-shirts made depends on the number of colors used in the T-shirt design and the number of T-shirts being ordered. A function giving A, the average cost per T-shirt, when c colors are used and n T-shirts are ordered is dollars. If 350 T-shirts are printed with six colors, determine (to the nearest hundredth of a cent) how quickly the average cost is changing when more T-shirts are printed.

A) 0.02 cents per T-shirt
B) -0.10 cents per T-shirt
C) 0.99 cents per T-shirt
D) -0.12 cents per T-shirt
E) -0.03 cents per T-shirt