Eylem is at a pool in Queens. There, she is swimming 5 feet below the water and she is slowly swimming up. Her swim can be modeled by the function f(x) = x2 + 2x-5 where x is the time in minutes and f(x) is the height above or below the water. When does she touch the surface? When does she come back down?​

answer: what are the following choices

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation:

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).