The pool at the apartment building is 30 feet long, 20 feet wide, and 5 feet deep. it has been filled 4 feet deep. how many more cubic feet of water are needed to finish filling the pool? a.600 cubic feet b.2,400 cubic feet c.3,000 cubic feet d.4,500 cubic feet

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

one fourth of 9% = 2.25%

gavin is correct in saying : the equivalent quarterly interest rate would be

2.25%.

step-by-step explanation:

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