Pls select ALL the correct answers <3

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

Can you me find the missing length. i attached an image.

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate