Solve the Problem. -Let F(x) Compute the Time in Hours to Travel X

Multiple Choice

Solve the problem.
-Let f(x) compute the time in hours to travel x miles at 60 miles per hour. What is the interpretation of f -1(9) ?

A) The miles traveled in 9 hours at 60 miles per hour
B) The hours taken to travel 9 miles at 60 miles per hour
C) The hours taken to travel 60 miles
D) The miles traveled in 60 hours