the study of finances of Glassford motors has shown that the profit of the company is modeled by p=-2n^2+800n+370000, where p is profit in dollars, and n is the number of trucks sold

a) at what point (how many trucks sold) will demand be too great (0 profit)

b) how many trucks need to be sold to profit $350000

2 answers

For part b) put $350000 in for p and solve for n.
For part a), use the method you learned to find the vertex of the parabola
p=-2n^2+800n+370000