How many significant digits does .100 have?
There are 3 significant digits. The zeroes are being used to show how precise/accurate the measurement is, in this case it is accurate to the thousandths place. Significant figures are all of the digits in a number except the zeros used only to place the decimal point. For example, if we say I get paid approximately $35,000 per year, this means that the figure is only correct to the nearest thousand. The exact ammount could be anywhere from 34,500 to 35,499. The zeros are not accurate and are used only to place the decimal point. Similarly, the zeros in 0.01 are not significant. The zero in 2.01 is significant; however, so is the zero in 2.0 because it indicates that the precise number of thenths is zero. Hopefully this will help you!
