College

The mass of an average grain of table salt in a sample is [tex]3 \times 10^4[/tex] grams, and the mass of an average grain of rock salt in a sample is [tex]1.2 \times 10^{-2}[/tex] grams.

Part A: Using the properties of exponents, what do you need to multiply [tex]10^{-2}[/tex] by to get [tex]10^{-4}[/tex]?