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a boat has a speed of 5 mph in calm water. it takes the boat 3 hours to travel upstream but only 2 hours to travel the same
distance downstream. using the data in the table, what is the value of c, the speed of the current?
rate (mph)
time (hr)
distance (mi)
3(5-c)
2(5+c)
upstream
downstream
5-0
1 mph
2.5 mph
5 mph
7.5 mph
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