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.
7 times 10 equals 70. Hope this helps (:
The sum of all exterior angles is always 360 degrees.
360/40=9 sides
the polygon has 9 sides.
widest to narrowest: y=3/2x2, y= -1/2x2, y= 1/4x2
Answer:
10x+23 (pretty sure) and the * means multiply
Step-by-step explanation:
