What he said...


Quote Originally Posted by Hydaral View Post
Part A is easy, t=0, so:

Tmax = 0^2 - 9*0 + 61/4
Tmax = 0 - 0 + 15.25
Tmax = 15.25

I have no idea what completing the square means, but if I sub in a random time for t, let's say 1000 hours, I get:

Tmax = 1000^2 - 9*1000 + 61/4
Tmax = 1000000 - 9000 + 61/4
Tmax = 991015.25

Which doesn't make sense in the given scenario, the temperature should keep going down. It bottoms out at 4.5 hours at -5 degrees and then starts rising again, what happened, the sun come out?