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 40% longer than the smallest size, how long, in inches, is the shoe in size 15?  Choose the correct choice from the following answers.
A) 5.4 B) 5.9 C) 6.3 D) 6.7 E) 7.5
Let x be the length of the size 8 shoe.   Then 0.4x = 9/5   x = 4.5 inches   The size 15 shoe has a length of  4.5 + 7/5= 
<gadget id="calculator"> 4.5 + 7/5</gadget>
<output>5.9</output>
5.9 inches   The answer is 5.9.
<result>B</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 40% longer than the smallest size, how long, in inches, is the shoe in size 15?