Exercises 129-132: Maximizing Altitude Ifair resistance is ignored, the height h of a projectile above the ground after x seconds is given by h(x) = -gx² + vox + ho. where g is the acceleration due to gravity. This formula is also valid for other celestial bodies. Suppose a ball is thrown straight up at vo = 88 feet per second from a height of h = 25 feet. a (a) For the given g. graphically estimate both the maxi- mum height and the time when it occurs. (b) Solve part (a) symbolically. 129. g = 32 (Earth) 130. g = 5.1 (Moon) 131. g = 13 (Mars) 132. g = 88 (Jupiter)

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