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NAME ______________________ Section ______________________ MATH 151 Quiz 6 Week 8 1. Find the 15th derivative of cos (3 x+5). 2. Let x (t)=5t 2+ √ 2t represent the position of a particle with respect to time t. What is the acceleration of this particle at time t = ½? a. b. c. d. 2.25 6 9 9.75 3. At which of these points is the tangent line to the curve defined by y=6 t 4−4 t 3 and x=2 t 2 horizontal? a. 0.5 b. 1 c. 2 d. none of the above