**Logarithmic** and **natural logarithmic functions** of values.

Example #1: When taking the log of a number the number of digits in the mantissa of your answer is equal to the number of significant figures in the problem.

Example #2: Provide the answer with the correct number of significant figures for each of the following:

a) log(1.15 x 10** ^{-5}**) b) log(100.)

When taking the antilog of a number the number of significant figures in the answer is equal to the number of digits in the mantissa of the problem.

Example #3: Provide the answer with the correct number of significant figures for each of the following:

a) antilog(-4.18) b) 10^{0.0033}