Problem #4 -8.2B Point S is shown on the number line.
S
5
6
7
Which value is best represented by point S?
A. Square root of 6.3
B. Square root of 7.5
C. Square root of 28
D. Square root of 36

c

step-by-step explanation:

at least i think its

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).