.00007
If it is to the negative power, you live the decimal point to the left (if positive, move to the right). In the case we move the decimal point 5 places to the left of 7. This results in .00007.
Vertex form is

We're practically in vertex form,

That's a vertex at x=0, y=4, (0,4)
choice C
Answer:
d
Step-by-step explanation:
I need more information to answer that.