Dora bought a bottle of nail polish that was marked down by 20 percent from its original price of $4.50. Including a 9 percent sales tax, what is the final cost of the bottle of nail polish?

Tanyss's house has 25 windows. her brother has washed 22 of the windows. what percent of the windows has her brother washed?

On every three hamburgers that mcdonald’s make they use 9 pickles how many pickles would they use on 99 burgers

The john deere company has found that revenue,in dollars, from sales of heavy-duty tractors is a function of the unit price p, in dollars, that it charges. if therevenue r is r(p)= -1/2p^2 +1900pa)how much revenue will the company generate if they sell 700 tractors? b) how many tractors does the company want to sell to maximize the revenue?