Answer:
Hi, there your answer is no it is not a function
Step-by-step explanation:
Since x is repeating itself
Answer:
[see below]
Step-by-step explanation:
Volume of a triangular prism is: 
We are given the base of 5, the length of 12, and the height of 8. All measurements are in meters.

The volume of the prism should be 240 square meters.
So we would want to isolate x. Start by multiplying both sides by -3. Since we are multiplying negative number, we flip the sign.
So that would be x ≥12. That means x should be greater than or equal to 12.
So now it's easy to answer.
C, D, E would be the answer.