12. Rocket Launch. You are observing a rocket launch from a point 8000 feet from the launch pad (Fig. 5). When the observation angle is :/6, the angle is increasing at 7/6 feet per second. How fast is the rocket traveling? [Hint: 8 and h are functions of t.) dt 8000 fi. Fig. 5 : Rocket launch 13. Evaluate the integrals 10x sin (2x )dx 14. Decompose the fraction 9x2+ 13x + 15 x3 + 2x - 3x