Which of these is an example of a final good? a.)wood b.)steel c.)needle

 An example of a final product would be a needle because the needle needs to go through a process of making it, unlike common founded objects/resources like wood and steel.

In all the answer would be C.) Needle 

4 times

Step-by-step explanation:

1 quart is equivalent to 32 fluid ounces.

If each eruption consumes 8 fluid ounces of vinegar. Assuming that the amount of vinegar required per eruption is constant, the number of times Tanvi can make her volcano erupt is:

Tanvi can make her volcano erupt 4 times  with 1 quart of vinegar.