If BC = 6.7, CD = 6.2, and AD = 13.3, find AB to the nearest tenth.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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