Answer questions 8-10

8. The position function of an object is defined as: s(t) = =t3 - 3t2 + 8t Find the velocity when the acceleration is 0. a ) 0 b) - 1 c) 1 d) none of these 9. The height of an object is determined by the function h(t) = t3 - 6t2 Find its minimum velocity a) -12 b) 0 c) -32 d) none of these 10. Consider the following graphs: Which one is the graph of the curve with equation: f (x) = x2 + 1 x-1 Explain at the bottom. [2 marks] A B C Explain why you chose the one you did and why the others are not correct