Problem 10. (1 point) Problem 13. (1 point) For each of the indefinite integrals below, choose which of the Evaluate the indefinite integral following substitutions would be most helpful in evaluating the integral. Enter the appropriate letter (A,B, or C) in each blank. DO NOT EVALUATE THE INTEGRALS. (25 - x2) 15/2 dx A. x = 7 tan 0 +C B. x = 7 sin 0 Answer(s) submitted: C. x = 7 sec0 (incorrect) 1. ( 49 -x2) 3/ 2 dx Problem 14. (1 point) 2 . Vx2 - 49 dx Evaluate the definite integral 3 . ( x 2 - 49 ) 512 dx (5V3 / 2 V25 - x2 dx 4 . ( x 2 ( 49 + x 2 dx 5. / x dx Answer = V49 -x2 Answer(s) submitted: Answer(s) submitted: (incorrect) Problem 15. (1 point) (incorrect) Evaluate the integral Problem 11. (1 point) 1 VR + 16 d Evaluate the definite integral. Note: Use an upper-case "C" for the constant of integration. forva +9 dx Answer(s) submitted: (incorrect) Answer(s) submitted: (incorrect) Problem 16. (1 point) Evaluate the integral Problem 12. (1 point) 6 Evaluate the indefinite integral. * 4 V X 2 - 2 dx 121 x2 V400x2 - 81 -dx Note: Use an upper-case "C" for the constant of integration. Answer(s) submitted: Answer(s) submitted: (incorrect) incorrect)