A manufacturer produces a certain men's athletic shoe in integer sizes from 8 to 17. For this particular shoe, each unit increase in size corresponds to a 1/5-inch increase in the length of the shoe. If the largest size of this shoe is 20% longer than the smallest size, how long, in inches, is the shoe in size 15?
Answers
A) 8.6  B) 9.8  C) 10.4  D) 11.2  E) 12.6
Let x be the length of the size 8 shoe.   Then 0.2x = 9/5   x = 9 inches   The size 15 shoe has a length of  9 + 7/5= 
<gadget id="calculator"> 9 + 7/5</gadget>
<output>52/5 = around 10.4</output>
10.4 inches   The answer is 10.4.
<result>C</result>
A manufacturer produces a certain men's athletic shoe in integer sizes from 8 to 17. For this particular shoe, each unit increase in size corresponds to a 1/5-inch increase in the length of the shoe. If the largest size of this shoe is 20% longer than the smallest size, how long, in inches, is the shoe in size 15?