The function c=120+.20m represents the cost see in dollars of renting a car after driving miles how many miles would a customer have to drive for the cost to be $140

Customer have to drive for 100 miles for the cost to be $140.

Step-by-step explanation:

Here, the cost of rest function is given as:

C =  120+.20 m

From above function, we can see that :

m = Number of miles traveled by the rent car

(1) The fixed rental charge of  renting a car = $120

(2) The per mile rent of the car = $0.20

Now, C = $140

⇒140  =  120+.20 m

or 140 -  120 = 0.20 m

or, 0.20 m = 20

⇒ m = 20/0.20 = 100

or, m = 100

Hence, customer have to drive for 100 miles for the cost to be $140.