At 4 P. M., the total snowfall is 5 centimeters. At 7 P. M., the total snowfall is 12 centimeters. What is the mean hourly snowfall? Write your answer in simplest form as a fraction or mixed number.

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?