Find a trigonometric function $f$ represented by the graph in the figure. <IMAGE>

{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t²  where t is measured in seconds after the hit.

e. At what time is the ball at a height of 10 ft on the way down? 

Prove the following identities.

$\(\sec\]\theta\)=\(\frac{1}{\cos\theta}\)$

Prove the following identities.

$\(\tan\]\theta\)=\(\frac{\sin\theta}{\cos\theta}\)$

{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t²  where t is measured in seconds after the hit.

d. At what time is the ball at a height of 30 ft on the way up?

{Use of Tech} Height and time The height in feet of a baseball hit straight up from the ground with an initial velocity of 64 ft/s is given by h= ƒ(t) = 64t - 16t²  where t is measured in seconds after the hit.

c. Find the inverse function that gives the time t at which the ball is at height h as the ball travels downward. Express your answer in the form t = ƒ⁻¹ (h)

Changing bases Convert the following expressions to the indicated base.

$\ln \mid x\mid$ using base 5