. The amount of TIME spent driving (which depends on the SPEED of the car) is 5 hours. means time(speed) = 5. TIME and SPEED are your key words and 5 is the key number.
The correct answer is 6,8
I think it might be f^-1 (x) = x/2 - 3/2
I hope this helps!
The answer is 24" hope this helps.