Answer
Over six years, the total expense for a Mercury Grand Marquis is $\$15,000$ more than the total expense of a Honda Accord.
Work Step by Step
We can find the total annual expense for a Mercury Grand Marquis.
$expense = (\$0.65~/mi)(25,000~mi) = \$16,250$
We can find the expense for a Mercury Grand Marquis over six years.
$expense = (\$16,250/yr)(6~yr) = \$97,500$
We can find the total annual expense for a Honda Accord.
$expense = (\$0.55~/mi)(25,000~mi) = \$13,750$
We can find the expense for a Honda Accord over six years.
$expense = (\$13,750~/yr)(6~yr) = \$82,500$
We can find the difference in the expense for the two cars over six years.
$\$97,500 - \$82,500 = \$15,000$
Over six years, the total expense for a Mercury Grand Marquis is $\$15,000$ more than the total expense of a Honda Accord.
