Which statement is true about the given function? f(x) 0 over the intervals (–infinity, –2.7) and
(–1, 0.8).
f(x) > 0 over the intervals (–infinity, –1) and
(0.8, infinity).

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

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?