Question 1152568
If x=0 corresponds to 1980, than x=40 corresponds to 2020. If you plug in x=40 into {{{(0.03x^2+0.345x+0.9)/(x+4)}}} you get 1.425. Therefore, the cost for an ad will not reach $4 million in 2020 and the price will be $1,425,000. A graph of it is {{{graph(500,500,-5,40,-0.3,2,y=((0.03)x^2+0.345x+0.9)/(x+4))}}}