Can someone help me out on this math problem?

The population in a city is modeled by the equation p(d)= 100,000*(1+0.3) where d is the number of decades since 1970

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?

The functions f(x) and g(x) are described using the following equation and table: f(x) = -3(1.02)*