Answer #9 and #12

9. [0/0.83 Points] DETAILS PREVIOUS ANSWERS TAMUBUSCALC1 4.3.009. 1/6 Submissions Used 380 The marginal profit function for a company is given by P'(x) = - 6. Estimate the change in profit when the number of items sold increases from 1,696 to 1,720 with six subintervals of equal width and one of the following. (Round your answers to four decimal places.) (a) a right-hand Riemann sum -9.3420 X (b) a left-hand Riemann sum -9.3420 X Submit Answer 10. [0.83/0.83 Points] DETAILS PREVIOUS ANSWERS TAMUBUSCALC1 4.3.010. 1/6 Submissions Used Particular values of the marginal cost function of Kuddly Kites, a company that sells kites shaped like different animals, are shown in the table below, where x is the number of kites produced and C'(x) is in dollars per kite. X 176 184 192 200 208 216 224 232 240 248 256 C'(x) 1.25 1.5 1.75 2.25 2.5 3.25 4.75 5.75 6.5 8.25 8.5 Estimate the change in cost (in $) when the number of kites produced increases from 184 to 248 with four subintervals of equal width and one of the following. (a) a right-hand Riemann sum $ 312 (b) a left-hand Riemann sum $ 204 Submit Answer 11. [0.83/0.83 Points] DETAILS PREVIOUS ANSWERS TAMUBUSCALC1 4.3.011. 3/6 Submissions Used Let ( ((x) dx = 8, "((x ) dx = 4 , and ((x ) dx = 2. Find the following . (8 ) [ "R x ) ax = 12 (b ) (9r(x ) - 3 ) dx = 17.5 v New Randomization 12. [-/0.87 Points] DETAILS TAMUBUSCALC1 4.3.012. 0/6 Submissions Used Find the values of a and b such that r(x) ax - rex) dx - (brixx ax. Submit