+73 3.) One pump can fill a tank with oil in 4 hours. A second pump can fill the same tank in 3 hours. If both
pumps are used at the same time, how long will they take to fill the tank?
1/4 + 1/3 =1/T
1/T = 7/12 Take the reciprocal of both sides
T =12/7 =1 5/7 - hours =~ 1 hour and 43 minutes for both pumps to fill the tank.
+73 1/3 + 1/4 = 1/ Total Time Working Together
4/12 + 3/12 = 1 / T
7 /12 = 1 / T [ remember that we can write ]
12 / 7 = T / 1
12/ 7 = T
T = 12/7 hrs ≈ 1.7 hrs = 1 + .7(60) = 1 hr 42 min
Original Answer: https://web2.0calc.com/questions/4-sketch-a-graph-of-a-polynomial-that-would-have-help
Credit To: CPhill
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