Which expression correctly shows 20x4−25x3+60x2−75x factored completely over the integers?

a: 5x(x2−3)(4x+5)
b: 5x(x2+3)(4x−5)
c: 5x2(x+4)(3x−5)
d: (x2+3)(4x−5)

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

For which pair of functions is (gof)(a)=|a|-2?

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary