A kayaker travels x miles per hour downstream for 4 hours. On the 6-hour return trip, the kayaker travels 2 mile per hour slower
1 answer:
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The equation is separable, so solving it is trivial:
Integrating both sides gives
Given and
, we find
so the answer is E.
compare the divisor x-3 with x-a which will give a=3 and then use remainder theorem.
