Aroller coaster starts from a deck at an elevation of 20 feet above the ground. on the first hill it climbs 78 feet and then drops 85 feet. on the second hill the coaster climbs 103 feet and then drops 110 feet. how far below or above the deck is the coaster after the second hill?

(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.