19. A company's marginal cost function is MC = 94 where x is the number of units. Find the total cost of producing units 144 to 625. (Show work) 20. A technician can test video player chips at the rate of-3/' + 16/+ 5chips per hour (for 0 S : $ 6), where / is the number of hours after 9:00 am. How many chips can be tested between 1 1:00 a.m. to 3:00 p.m.? (Assume / = 0for 9:00 a.m.) (Show work)For each statement, write the null and alternative hypotheses. State which hypothesis represents the claim. 1?. Evaluate the limit, if it exists. Show work. xzErl lim 1"5 2x1o 13. Use limits to nd the area between the graph of the function and the x axis given by the denite integral. 5 I [x2 x + 13m: 1