If the energy generated by the natural gas is 1150 BTUs for each cubic foot of gas, we can find the amount of energy in a tank with 59.4 cubic feet of gas by multiplying this volume by the amount of heat generated per cubic foot:
![Energy=1150\frac{\text{ BTU}}{ft^3}\cdot59.4\text{ }ft^3=1150\cdot59.4\text{ BTU}=68310\text{ BTUs}](https://img.qammunity.org/2023/formulas/physics/college/y4k9isc8fjlo3e6ed7lqz0fvoby3zhp57k.png)
Therefore the amount of energy that can be produced is 68,310 BTUs.