Robot Company franchises combination gas and car wash stations throughout the United States. Robot gives a free car wash for a gasoline fill-up or, for a wash alone, charges $0.50. Past experience shows that the number of customers that have car washes following fill-ups is about the same as for a wash alone. The average profit on a gasoline fill-up is about $0.70, and the cost of the car wash to Robot is $0.10. Robot stays open 14 hours per day. Robot has three power units and drive assemblies, and a franchisee must select the unit preferred. Unit I can wash cars at the rate of one every five minutes and is leased for $12 per day. Unit II, a larger unit, can wash cars at the rate of one every four minutes but costs $16 per day. Unit III, the largest, costs $22 per day and can wash a car in three minutes. The franchisee estimates that customers will not wait in line more than i ve minutes for a car wash. A longer time will cause Robot to lose the gasoline sales as well as the car wash sale. If the estimate of customer arrivals resulting in washes is 10 per hour, which wash unit should be selected?

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter7: Systems Of Equations And Inequalities
Section7.2: Systems Of Linear Equations: Three Variables
Problem 61SE: Last year, at Haven's Pond Car Dealership, for a particular model of BMW, Jeep, and Toyota, one...
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Robot Company franchises combination gas and car wash stations throughout the United
States. Robot gives a free car wash for a gasoline fill-up or, for a wash alone, charges
$0.50. Past experience shows that the number of customers that have car washes following
fill-ups is about the same as for a wash alone. The average profit on a gasoline
fill-up is about $0.70, and the cost of the car wash to Robot is $0.10. Robot stays open
14 hours per day.
Robot has three power units and drive assemblies, and a franchisee must select the
unit preferred. Unit I can wash cars at the rate of one every five minutes and is leased
for $12 per day. Unit II, a larger unit, can wash cars at the rate of one every four minutes
but costs $16 per day. Unit III, the largest, costs $22 per day and can wash a car
in three minutes.
The franchisee estimates that customers will not wait in line more than i ve minutes
for a car wash. A longer time will cause Robot to lose the gasoline sales as well as the car
wash sale.
If the estimate of customer arrivals resulting in washes is 10 per hour, which wash unit
should be selected?
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