Answer:
30
Step-by-step explanation:
<span>x^2y=xy^2
Differentiate implicitly.
x^2y' + y(2x) = x(2yy') + y^2
x^2y' + 2xy = 2xyy' + y^2
x^2y' - 2xyy' = y^2 - 2xy
y'(x^2 - 2xy) = y^2 - 2xy
y' = (y^2 - 2xy)/(x^2 - 2xy)</span><span />
To find how long it would take, you must divide the total amount of gallons of water in the pond by the amount of gallons drained per hour. This would translate to:
4290 ÷ 78
Which would give you the total amount of hours needed to completely drain the pool, aka the answer:
4290 ÷ 78 = 55
1 gallon =128
1/2 gallon =64
128 x 5 (gallons)= 640 + 64 (1/2 gallon)= 704
so your answer is 704
