The first pump empties half the pond in 3 hours, so in 1/6 that time (1/2 hour), it empties (1/6)·(1/2) = 1/12 of the pond.
The second pump empties the other 5/12 of the pond in that half hour, so has a pumping rate of (1/2 h)/(5/12 pond) = (6/5 h)/pond.
The second pump could do the entire job alone in 1 hour and 12 minutes.
16 seconds. Assuming the biologist is traveling at a constant velocity, you can use the equation d = rt to find the time.
80 = 5t
t = 16 seconds
20% of a number is 1/5th of it so 50 × 5 is 250
Answer:
seven deadly sins a W
Step-by-step explanation: