Need math help with A gas station that charges $2.30 per gallon

Jan 4th, 2016
Price: $5 USD

Question description

A gas station charges $2.30 per gallon and $8.00 for a car wash. If drivers fill - up their cars and get a car wash, the gas station reduces the charge per gallon of gas to $2.20. The gas station manager has noticed that this incentive motivates more drivers to get a car wash. Assume that the average motorist buys 12 gallons of gas per visit to the gas station and that five out of a hundred motorists would also get a car wash w/out the advertised incentives. A). Under those normal conditions, how much money does the gas station take in for every hundred motorists?  B). How many additional carwashes would be necessary to at least break even, if gas is lowered by 10 cents a gallon( assuming the profit on a car wash is negligible)?

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