usain bolt stands at the bottom of an infinite flight of stairs waiting for a cannon to shoot a tennis ball straight up. if he can climb one flight of stairs every 3 seconds, each of which are 10 m tall and the cannon shoots the tennis ball with an initial velocity of 250m/s: a.) how many flights of stairs can he climb before he'll need to lean out the window to catch the ball?(i got 8.5 flights not sure if that correct) b.)what will the speed of the ball be when he catches it?( i assumed that he would catch the ball just as it reached it max height...so assuming 0m/s)

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