15. higher order thinking the price of stock a at 9 a. m. was $12.73.
since then, the price has been increasing at the rate of $0.06 per hour.
at noon, the price of stock b was $13.48. it begins to decrease at the rate
of $0.14 per hour. if the stocks continue to increase and decrease at the
same rates, in how many hours will the prices of the stocks be the same?

beluga wheeeaaalle matt

step-by-step explanation:

i believe it's a.

i'm not sure on this one, most likely correct.

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).