Aprojectile is launched into the air. the function h(t) = -16t2 + 32t + 128 gives
the height, h, in feet, of the projectile t seconds after it is launched. after how
many seconds will the projectile land back on the ground?

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.