the profit, P(x), of a video company, in thousands of dollars, is given byP(x)=-5x^2 + 550x - 5000.where x is the amount spent on advertising, in thousands.

a. determine the maximum profit that the company can make. i got $16,125.00

b. determine the amount spent on advertising that will result in a profit. i keep gettin a negative number which i know cannot b rite.bt i am using the quadratic formula.

c. determine the amounts spent on advertising that will result in a profit of at least $4,000,000.00