Itd be $4.78
1200/251.2=4.77707006, rounded to the nearest cent would be $4.78 :)
Vertex form:
y = a(x - h)² + k
I have not learned this stuff yet, but by using online calculators, I can determine that the vertex form is:
Y = (x - 4)² - 19
I believe so :/
The answer is C.
90/105=6/7
Hope this helps!