In: Physics
When we add or subtract two numbers with uncertainties, the uncertainty of the result is the sum of the absolute uncertainties of the two numbers.
When we multiply or divide two numbers with uncertainties, the uncertainty of the result is the sum of the relative uncertainties of the two numbers.
The relative uncertainty of is
The relative uncertainty in A is
The relative uncertainty in B is
The relative uncertainty in the product is
The product is
The absolute uncertainty is
Therefore the product is