It's a 4th degree polynomial since the largest degree (exponent) is 4
Option C is the correct answer as SAS stands for Side, Angle, Side. You would need one side, one angle and another side to be the same for the conditions for congruency to be met.
If you are given 25 gallons, then all u have to do is multiply 25 by 2.369
and the answer is $59.225
ANSWER
Vertex form;

Vertex

EXPLANATION
Given:

We complete the square as follows:


The vertex form is:

The vertex is
