Exercise 16

As water drains from a tank the drainage rate continually decreases over time. Suppose that a tank that initially holds 360 gal of water drains in exactly $6$ minutes. Answer each of the following questions about this problem situation.

Suppose that $\fe{V}{t}$ is the amount of water (gal)left in the tank where $t$ is the amount of time that has elapsed (s) since the drainage began. Which of the following is the most realistic value for $\fe{\sd{V}}{45}$?

1. $1.0$

2. $0.001$

3. $-1.0$

4. $-0.001$