The marginal prot in dollars on Brie cheese sold at a cheese store is given by P'(x) =x (70x2 + 90x) , where x is the amount of cheese sold, in hundreds of pounds. The "prot" is - $60 when no cheese is sold. a. Find the prot function. b. Find the prot from selling 300 pounds of Brie cheese. a. Find the prot function. P(x) = b. Find the prot from selling 300 pounds of Brie cheese. The prot from selling 300 pounds of Brie cheese is $