An aircraft cost 2852 per hour to operate, what is the total cost for 5.7 hours

Hi Sandra;

I like Nancy's answer, but want to add to it.

($2852 hours)

This can also be written as...

(2852 dollars/hour)

However, I think your instructor wants to see the former. I just want to illustrate as much as possible...

($2852/hour)(5.7 hours)=x

Let's cancel units where appropriate...

The hours are in both the denominator and numerator of the left side...

($2852/hour)(5.7 hours)=x

Cancelling units must come before calculations. This is because if your units are not aligned, you have the wrong equation.

($2852)(5.7)=x

The only unit remaining is the $. Your answer is requesting "total cost". This works.

$16256.40=x

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