Robert S. answered • 09/04/14

Tutor

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Enthusiastic 3M Organic Chemistry PhD Who Wants to Help You Succeed!

Hello! This seems like you are missing some data in the question! We can start by figuring out the values we can create.

**How far have you gone?**

Traveled at 80.3 km/hour for 3.5 hours, and you want that answer in miles, and there are 1.61 km in every milefor the final calculation. Let's set up the unit conversion.

80.3 km/1 hour * 1 mile/1.61 km * 3.5 hours = ? miles

80.3 km/1 hour * 1 mile/1.61 km * 3.5 hours = ? miles (unit cancellation checks out)

80.3 km/1 hour * 1 mile/1.61 km * 3.5 hours = 174.57 miles

**How much gas have you used?**

Your car gets 22.6 miles/1 gallon and you have traveled 174.57 miles. We want our answer in gallons, so we can set our unit conversion up like this:

1 gallon/22.6 miles * 174.57 miles = ? gallons

1 gallon/22.6 miles * 174.57 miles = ? gallons (units cancel)

1 gallon/ 22.6 miles * 174.57 miles = 7.72 gallons

**How much does that cost?**

This is a complicated answer, because you don't have the data for it, because you could find out how much gas costs in Ireland in €⁄L and then convert that to $/gal or you could take the average price, in $/gal in Saint Louis and use that. If you set up those problems like I have above, you should be able to find the answers no problem.

Best of luck!

Robert S.

tutor

I'm on my phone now so it's harder, but here goes. I'll set it up. You want your answer in dollars.

7.72 gallons * 0.26 liters/1gallon * 1.604 euro/1 liter * 0.93 $/1 euro = ? $

Simple multiplication now.

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09/04/14

John C.

I really appreciate the help. Thank you so much

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09/04/14

Robert S.

tutor

Glad I could help I hope the way I did it makes sense and you can start to set them up!

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09/04/14

John C.

09/04/14