Question 1187444
Starts with 5 gallons to decrease 13% each hour, means at some small quantity you need to decide when so little water remains that the container may be called empty.


The container KEEPS 87% each hour.

{{{v}}}{{{gallons}}}
{{{t}}}{{{hours}}}


{{{v=5(0.87)^t}}}------this by itself will never become 0.