Do all problems, in order, on your own paper. Show all work: substitutions most how u= , du=] etc. Put a box around your final answers. ( + 8 lo each correct answer ) 1 ) a) S + + 1 dx bl "* + 1 2 x " ) se dx " ) a ) S6 x - 2 * + 2 dx 6 ) ( 6 x - 2 * + 2 2 x [ x d x c ) . x 3 + 2 3) a) Velocity is viti= 8 12t-1) Position s is 5 when t= 1. Find the position s when t= 2. b) Marginal cost is C'(x) = 3X +40. Overhead is $70. Find the cost to make 3 items. 4) dx 24 = 4 6x and when X= 1, y= 1 . Find ylx). 5 ) Estimate S 2 x+ 1 2x using n= 3 rectangles and right-hand endpoints . 4 6 ) a ) Find 2 2 122 b ) D'i= 2 1 6 1=1 Find 2 2:2- 50-7. (OVER )