math question?

0 ⤊

thal speed of 80 meters ptie formula h=80t-5t2 can be used to find the height h in meter of an object shot upward from the ground at the initial speed of 80 meters per sec., after t seconds. find the height after 4 seconds (t=4)

2006-11-05 19:19:38 · 3 answers · asked by shelleyr2005 1 in Science & Mathematics ➔ Mathematics

3 answers

just plug in 4 for t

h=80t-5t^2
h=80(4)-5(4)^2
h=320-5(16)
h=320-80
h=240 m

2006-11-05 19:24:25 · answer #1 · answered by tma 6 · 0⤊ 0⤋

plug in 4 for t

H = 80(4)-5(4)2

H = 320-40

H = 280

2006-11-05 19:23:33 · answer #2 · answered by Jac R 3 · 0⤊ 0⤋

h=80.4-5.16=320-80=240

2006-11-05 19:33:09 · answer #3 · answered by fii 3 · 0⤊ 0⤋