if Juan takes 13 seconds to run y yards, how many seconds will it take him to run x yards at the same rate?	Choose the correct choice from the following choices
A) 11x/y
B) 11y/x
C) x/11y
D) 11/xy
E) 13x/y
Answer is E   The rate of running hards: 13 minutes per y hards.   Thus the time for running x hards = x hards * 13 minutes/y hards = 13x/y
<result>E</result>
if Juan takes 13 seconds to run y yards, how many seconds will it take him to run x yards at the same rate?