Iam not sure how to solve the problem

What is the distance between (–2 1/2,-3) and (1, –3)?

What is 1/2 x (6 x 4)+3 + 2 show your work

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