How many cubic feet is 2.5 million dollars?

Answer 1

This question cannot be answered sensibly. A cubic foot is a measure of volume, with dimensions [L3]. A dollar is a measure of commercial value. The two measure different things and basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.

2.5 million dollars, made up of pennies will take up a huge amount of space whereas a cheque for that amount will take up less than a thousandth of a cubic foot.

Answer 2

Money cannot be converted directly to cubic feet because they are two different types of units. Cubic feet is a measure of volume, while dollars is a measure of currency.