A firm has the marginal-profit function dP 9000 - 3000x dx (x7 -6x + 10) , where P(x) is the profit earned at x dollars per unit. Find the total-profit function given that P = $1500 at x = $3 How can the total-profit function be found? A. Substitute the given value of P into the marginal-profit function and solve for x. O B. Substitute the given value of x into the marginal-profit function and evaluate. O C. Find the antiderivative of the marginal-profit function and use the given values of x and P to find C. O D. Find the derivative of the marginal-profit function and use the given values of x and P to find C. Find the total-profit function. P(x) - Click to select your answer(s) 300 0 + 75'F Cloudy ~ 9 4606 O a 19 to search