Answer:
If it is at -8, -8 then p is at 0,0
Step-by-step explanation:
Sorry, there is not much information given to answer.
For this case we have that by definition, the density is given by:

Where:
M: It is the mass of the diamond
V: It is the volume of the diamond
According to the data of the statement we have:

So the volume is:

Thus, the volume of the diamond is approximately 
Answer:

In 48 days, they would have consumed 108 gallons, and have 22 left, so yeah. 48 days
9 - 2(7 - 8)
9 - 2(-1)
9 - (-2)
11