Question

Gary learned that the value of his car depreciates by 15% percent per year. Which of the following functions best describes the value of his car the year after the car is worth m dollars?
A.f(m)=0.15m

B.f(m)=0.85m

C.f(m)=1-0.15m

D.f(m)=1-0.85m

Answer 1

For this case we have that the original value of the car is:
 m dollars
 For the following year we have the value is:
 ((100-15) / (100)) m
 Rewriting we have:
 ((85) / (100)) m
 0.85m
 Answer:
 the value of his car the year after the car is worth m dollars is:
 B.f (m) = 0.85m