3) Dena is trying to solve this problem: A store has a sale where every item 2 p has a sale price that is 20% less than the regular price. Write an expression
that represents the sale price of an item if the regular price is p dollars.
Dena said, "To find 20% of a number, I should multiply by 0.20. So the sale
price of an item will be 0.20p. Which statement best describes Dena's
reasoning?

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

Issof claims that the scale factor is 1/2. which statement about his claim is correct

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?