Question

Stan Moneymaker needs 15 gallons of gasoline to top off his​ automobile's gas tank. If he drives an extra eight miles​ (round trip) to a gas station on the outskirts of​ town, Stan can save ​$0.10 per gallon on the price of gasoline. Suppose gasoline costs ​$3.00 per gallon and​ Stan's car gets 25 mpg for​ in-town driving. Each mile that Stan drives creates one pound of carbon dioxide. Each pound of CO2 has a cost impact of ​$0.02 on the environment. What are​ Stan's savings per mile for the eight mile extra​ trip, including the effect of environmental​ costs?

I'm stuck on this.

Its asking for Stan's savings are $_____ per mile round to four decimal places

The correct answer was $0.0513. How did they get that?

Answer 1