To rent a carpet cleaner, Tools To Go charges $15.00 for the first hour or part of
an hour plus $3.50 for each additional half
hour or part of a half hour.
a) Tim picked up a carpet cleaner at
8:10 a. m. and returned it at 4:10 p. m.
Determine his rental charge.
b) Calculate the average cost per hour for
Tim’s rental.
c) Charmaine rented a carpet cleaner from
Carpet Emporium. Her bill was $59.40
for 5.5 h. Compare the average cost per
hour for Charmaine’s rental with the
average cost per hour for Tim’s rental.
How many times as much was
Charmaine’s rental?

A) His rental charge is $64

B)The average cost per hour for  Tim’s rental is 8 dollar/hour

C) Charmaine’s average cost is 1.35 times Tim's average cost

Step-by-step explanation:

Rent for first hour of carpet cleaner = $15

Rent for each additional half  hour carpet cleaner = $3.50

a)Tim picked up a carpet cleaner at  8:10 a.m. and returned it at 4:10 p.m.

Total time = 8 hours

So, Rent for first hour of carpet cleaner = $15

Now no. of half an hours in remaining 7 hours is 14

So, Rent for each additional half  hour carpet cleaner = $3.50

Rent for 14 additional half  hour carpet cleaner =

So, Total rental charge = 49+15 = 64

Hence his rental charge is $64

b)Calculate the average cost per hour for  Tim’s rental.

Average cost =

c)Charmaine rented a carpet cleaner from  Carpet Emporium. Her bill was $59.40  for 5.5 h.

Average cost =

Let Tim’s rental be x times as much was  Charmaine’s rental

So,8x=10.8

x=1.35

So, Charmaine’s average cost is 1.35 times Tim's average cost

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