Please help, thanks if you do

What is the least common factor of 6 and 8

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

Negative 5 1/12 + negative 4 1/4 + 6 3/4