What is the following sum 4(^5√x^2y)+3(^5√x^2y)a) 7(^10√x^2y)b) 7(^10√x^4y^2)c) 7(^5√x^2y)d) 7(^5√x^4y^2)

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).