In a large population, 57% of the people have been vaccinated. If 5 people are randomly selected, what is the probability that at least one of them has been vaccinated? Round your answer to three decimal places. hurry pl

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?