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6:20 PM Thu Jun 25 0)) 50% I webassign.net 3- [012 Points] DETAILS PREVIOUS ANSWERS OSCALC1 3.4.154. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A ball is thrown downward with a speed of 8 ft/s from the top of a 69 ft tall building. After t seconds, its height above the ground is given by s(t) = 16t'2 8t + 69. (a) Determine how long (in s) it takes for the ball to hit the ground. 2.4 | x s (b) Determine the velocity (in ft/s) of the ball when it hits the ground. Additional Materials I3] eBook 4- [-I3 Points] DETAILS OSCALC1 3.4.156. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The Position of a hummingbird flying along a straight line in t seconds is given by s(t) = 3t3 5t meters for t 2 0. (a) Determine the velocity of the bird (in m/s) at t = 2 s. :1 m (b) Determine the acceleration of the bird (in m/sz) at t = 2 s. :1 m,.2 (c) Determine the acceleration of the bird (in m/sz) when the velocity equals 0. (Round your answer to two decimal places.) [:1 m,.2 Additional Materials E] eBook 5. [-l17 Points] DETAILS OSCALC1 3.4.165. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER