Question

A parking garage charges ​$1.50 for the first hour and ​$0.75 for each additional hour. If a customer gave the parking attendant ​$20 for parking from 10 A.M. to 3 P.M.​, how much did the garage​ charge? Which piece of information is not necessary to solve the​ problem?

A) ​$0.75 parking charges for each additional hour
B) ​$1.50 parking charges for the first hour
C) ​$20 the customer gave the parking attendant
D) Amount of time the customer was parked

Answer 1

The total parking charge was $4.50 for parking from 10 A.M. to 3 P.M. The unnecessary piece of information is the $20 the customer gave to the parking attendant.

Step-by-step explanation:

To calculate the total parking charges for the given scenario, we need to consider the duration of parking and the rates charged for the first hour and each additional hour.

The car was parked from 10 A.M. to 3 P.M., which is a total of 5 hours. The parking garage charges $1.50 for the first hour followed by $0.75 for each additional hour. The first hour would therefore cost $1.50. The remaining 4 hours, at $0.75 each, accumulates to $3.00 (4 hours × $0.75). The total cost would be $1.50 (first hour) + $3.00 (additional hours) = $4.50.

The piece of information not necessary to solve the problem is C) $20 the customer gave the parking attendant, as the question asks for the charge, not the change given.