times by the little number like .420 is 80
you take the number next to the 10 and move the decimal point back over that many places
You will have a negative decimal. For example, -754 in scientific notation is -7.54*10^2.
1.51 x 104In engineering you usually keep with powers that are multiples of threes so this would be15.1 x 103This is because usually units are stated that way - so if these were grams you would say...
4,160,000,000 in Scientific Notation = 4.16 x 109