A car gets 28 miles to the gallon. If it is modified to use a solar panel, it will use only 80 percent as much fuel as it does now. If the fuel tank holds 15 gallons, how many more miles will the car be able to travel, per full tank of fuel, after it has been modified?
Choose the correct answer.
A) 85  B) 90  C) 95  D) 100  E) 105
Originally, the distance the car could go on a full tank was   15*28= 
<gadget id="calculator">  15*28</gadget>
<output>420</output>
420 miles.   After it has been modified, the car can go  28/0.8= 
<gadget id="calculator"> 28/0.8</gadget>
<output>35</output>
35 miles per gallon.   On a full tank, the car can go  15*35= 
<gadget id="calculator"> 15*35</gadget>
<output>525</output>
525 miles, thus 105 miles more.   The answer is 105.
<result>E</result>
A car gets 28 miles to the gallon. If it is modified to use a solar panel, it will use only 80 percent as much fuel as it does now. If the fuel tank holds 15 gallons, how many more miles will the car be able to travel, per full tank of fuel, after it has been modified?