N E ZOOM??? i wanna do a zoom to say merry christmas and talk

Find the value of the cosine for angle a

Can any one me with the answers to these questions asap?

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second