It's discrete as they do not grow forever..!!!!
The discriminant is b^2 -4ac
a = 1
b = -2
c = 4
discriminant = 4 -4 * 1 * 4 =
4 -16 =
-12
I get MINUS 12 as the answer but that isn't one of the choices.
Anwser:
I think it is 82 because it goes down 2 than sunday it goes up 2 to put it back at 82.
80 * 3.5 = 280
she travels around 280km in 3.5 hours.