Which of the following could be an interior angle measure of a regular polygon? a. 45º b. 72º c. 150º d. 173º

take 360 and divide by the number of sides

regular means the sides are equal therefore the angles are equal

360 /4 =90

360 /5 =72

B

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).