Question

You have estimated that you will drive 850 miles per month. If your car gets 23.1 mpg and gas costs $3.22 per gallon, what should your monthly gas budget be? (round to the nearest dollar)

Answer 1

You can use dimensional analysis where you try to cancel the units.
So you have (850 miles)/month, (23.1 miles)/gallons, and (3.22 dollars)/gallon.
You want dollars/month.

Answer 2

You may flip one of the fractions if it makes it easier to cancel, but you have to remember to put the number in the denominator as well.

Answer 3

$118.00-119.00

Answer 4

\[850 miles \div \frac{ 23.1miles }{ gallon } \times $ 3.22 = $ 118.4848485\]

Since the number in the tenths place is 4, the figure will be rounded to 118. But we are dealing with money. In this case the correct answer or the "nearest dollar is $119. You cannot pay any clerk lesser amount that what is its intended price. if this is not the case, no one will have to give a change.'