357 miles in 5 hours per hour find until rate rounded to he nearest hundredth

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 slope! (30 points)

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?