Part A: MULTIPLE CHOICE [one mark each, 22 marks] 1. Determine the magnitude of the moment of force. a] 23] b) 78] c) 299 I d) 704-] 2. If a + I; + 5 =0, and ll = 3 '5' = 5 and |E| = 7, then the angle between 61 and E is a] 30 b) 60 c) 120 d) 1500 g 3. Evaluate the limit, if it exists: lim x3x+2- x>l X -1 a] 1 b) (J c) 1 d) does not exist 4. Evaluate the limit for the graph limf(x) . ital a) + 00 b) 00 c] 1 d) does not exist 5. Find f'(l)if If(x)=(1f;+1)(x2_])_ a] 4- b) 4- c) 1/2 d) 1 .t x23 6. Find 1'12) if f(x)= a] 8 b) 7 c] 4 d) 2 7. The demand function for a product is given by p(x) =19 + 4x. where x is the number of units ofthe product sold and p is the price, in dollars. The cost function is C(x) =11}; 4.23:2 . What is the marginal prot. to the nearest dollar, when 700 units ofthe product are sold? a] $2810 b) $3001 c) $2675 :1) $2808 8. Find the points on the curve y = 2 l where the tangentline has a slope of i. x a] law-23> . (1,.) (22) 2 2 2 2 a (1. 1) ms 12;} 0192.: In! [1, I)