Question

Write an integer to represent this situation: Draining 15 gallons of water from a fish tank

Answer 1

The integer that representes the draining of 15 gallons of water from a fish tank is
`\Delta V = V_(f) - V_(o) = -15\,gal`

Explanation:

The gallon is a capacity (volume) units. The draining means that a part of the tank capacity occupied by water is removed. Then, the change in tank capacity is equal to a negative integer. That is:

`\Delta V = V_(f) - V_(o) = -15\,gal`

Where:

`V_(o)`,
`V_(f)` - Initial and final capacities in the fish tank, measured in gallons.

Hence, the integer that representes the draining of 15 gallons of water from a fish tank is
`\Delta V = V_(f) - V_(o) = -15\,gal`