SOLUTION: A homeowner must decide whether to buy or rent a garden rototiller. If she rents the machine, the rental fee is $25 per day, and the daily cost to use it is $5 for gas. If she wer

Question 1109979: A homeowner must decide whether to buy or rent a garden rototiller. If she rents the
machine, the rental fee is $25 per day, and the daily cost to use it is $5 for gas. If she were
to buy the machine, the purchase price is $650, and the daily cost is $7 for gas, oil, and
maintenance. On which day of use would the rental costs become greater than the
ownership costs?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Plot , total cost on vertical axis
Plot = time in days on the horizontal
-------------------------------------------
Renting the machine:
(1)
(2)
----------------------------
I'll find out when the costs are equal

----------------------
The Rental costs become greater during the 28th day
------------------------------------------------------
check:
I'll say
(1)
(1)
and
(2)
(2)
(2)
------------------------------
Ok -the rental costs become slightly higher on day 28
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