64. a firework was lit from the ground and

projected straight up with a velocity of 128 feet

per second. how long will it take the firework

to reach a height of 256 feet? use the equation

h= -16t2 + 128t, where h is the height in feet

and t is the time in seconds. teks a. 8(a)

mp a1(a), a. 1(c)

-

a 2 s

b 4s

c 8s

d 16 s