Dont you thin some math question are kinda incomprehensible?

Sasquatch219
Sun, 18 Jan 2009 16:39:01 +0000

Uhh where is something divided by 2, october4th? If you could explain what I’m missing/what I’m doing wrong it would be great. Thanks!

n(t) = 0.5t^2 - 20t + k
n(10) = 0.5(10)^2 - 20(10) + k
n(10) = 0.5(100) - 200 + k
n(10) = 50 - 200 + k
n(10) = -150 + k
set .5t^2 - 20t equal to whatever you get
0.5t^2 - 20t = -150
Did I do that right/where do I go from here? I tried the quadratic formula on 1/2t^2-20t + 150 and got 20 plus or minus square root of 300, which isn’t correct. : (
EDIT: Nevermind, I messed up on the quadratic formula, now I got 30 and 10 :D