If a manufacturer charges q dollars each for footballs, then he can sell 3000 -150q footballs per week. 

Find a polynomial R(q) that represents the revenue for one week

R(q)=q(3000-150q) = -150q^2+3000q

Find the weekly revenue if the price is $8 for each football.

R(8)= -150(8)^2+3000(8)= -9600+24000= 14400