A drop of rain falls from a height of 1,400 feet above the ground. The function h(t) = –16t² + 1400 is used to model the raindrop’s height, h(t), in feet t seconds after it starts to fall. What is the raindrop’s average rate of change 2 to 3 seconds after it falls? (This is measured in feet/second)

(c) the diagram shows the first three shapes of a matchsticks arrangement. first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.