Question

蘇

第7題的第2跟3小題求解，謝謝

(1) Find
(2) Find the equation of tangent line at the point
dx
velocity of the ball is 80 ft/s. St-tbt#Vot tho - -* bt1 80t +4000
7. (15%) A ball is thrown straight upward from the top of a 4000-foot cliff. The initial
/s. S = = +
ds
(1) Write the position, velocity, and acceleration functions of the ball.
(2) When is the ball at its highest point? How high is this point?
(3) When does the ball hit the ground? How fast is the ball traveling when it hits the ground?
dt = -32t+80
d's
at 2-32
20