Answer With true or false only

Mathematically, a stock is presented by a

For a system dynamics model consisting of packaged water bottles flowing into an inventory

of $200$ stocked up water bottles then deployed into different outlets driven by outlet demand.

The equation of stock: Imventory $(t)=200+{\displaystyle \underset{0}{\overset{t}{}}}$ outlet demand $(t)dt-{\displaystyle \underset{0}{\overset{t}{}}}$ water bottles $(t)dt$