Ok, there has to be somewhere online that has a nice list of basic math equations, like how to find the area of a circle, how to find the perimeter of a triangle, etc, etc, etc, all that basic ...

One simple math formula forms the fundamental basis for the human economy. Just remember that in many ways, compound interest is one of the main reasons we're here.

Fannie Mae has an excellent landlord guide that lists the lifespan of various components for easy reference. Here's the formula, using the example of a mid-priced electric range at Home Depot ...