Need help please! thanks

-13 6. What is the derivative of the function f (x) = - ((-4x6 + 15x3 - x+15) First re-write the function then use the general power rule. 7. The monthly profit, measured in thousands of dollars, of a certain company can be modeled by the function Pr(x) =-0.0001x* + 50x -1,000, where x represents the number of shipping containers full of product that are shipped. Find the marginal profit for this company at a production level of 100 shipping containers shipped per month. Interpret your result using complete sentences