The function c(x) = 63. (1.03)* models the cost in dollars, a of 1 ounce of a certain chemical used in a laboratory. e represents the number of years since 1990. By what percentage per year does the cost of the chemical increase or decrease over time?​

i just took the test, the correct answer is .. 31.5 in.

20%

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).