Question:

Jake is riding an escalator. After riding for 3 seconds, he was 25 inches above the ground.

A. How many inches is Jake rising per second?

B. At the rate Jake is rising, how many inches above the ground will he be after riding the escalator for 15 seconds? Justify your answer.

C. The top of the escalator is 30 feet, or 360 inches, above the ground. Will Jake have reached the top 45 seconds after first getting on the escalator? Why or why not?

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 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).