Are the number of digits in a constant considered in calculations when determining the number of significant figures (speed of light, gas constant, specific gravity, etc.)? Can I use calculators with your courses? If so, what kind should I use? Do answers need to be in scientific notation or decimal? Is there a general rule? Do you have any resources for students who are struggling with significant figures? How do I do math with scientific notation? How do I do scientific notation on a calculator? When are zeros significant? When should I round the numbers to take significant figures into account? Why are zeros at the end of the number and not to the right of the decimal not considered significant?