Can need help again please anyone

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Percent increase and decrease. original number: 45 new number: 18

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?