If John takes 7 minutes to eat x raisins, how many seconds will it take him to eat z raisins, assuming he continues to eat at the same rate?
Options:
A) 420xz	B) 7z/x	C) 420z/x	D) 7xz	E) 420x/z
It will take (z/x)(7) minutes which is (z/x)(7)(60) seconds = 420z/x seconds.   The answer is 420z/x.
<result>C</result>
If John takes 7 minutes to eat x raisins, how many seconds will it take him to eat z raisins, assuming he continues to eat at the same rate?