It has 4 significant figures.
Significant Figures
à Non-zero numbers are always significant figures.
à Zeros are tricky:
- If zeros appear before a non-zero (called leading zeros), they are NEVER significant (ex: 0.025)
- If zeros fall between non-zero numbers, they are ALWAYS significant (ex: 205)
- If zeros come at the end of the number, they WILL be significant only IF there is a decimal present (ex: 250.0)
à Exact numbers (or counting numbers) have infinite significant figures. For example, if we count 3 pencils, we know there are exactly 3 pencils. Or, when we say 1 inch = 2.54 cm, we know this is for exactly 1 inch.
Four - the first three zeros are not significant.
4 significant figures.
4 of them.
2 of them.
3 of them.
1 of them.
4.
2 :)
Four
Non-zero digits are always significant, so the number 12 has two significant figures.
2 significant figures.
3 significant figures. (The zero after the 5 doesn't count.) 4 significant figures if the zero after the 5 does count. A good way of expressing three thousand four hundred fifty with three, four, or five significant figures is with scientific notation: 3.45 * 103 3.450 * 103 3.4500 * 103
Significant figures are used to receive a more accurate number. To obtain the number you you multiply or divide the quantities, leave as many significant figures in the answer as there are in the quantity with the least number or significant figures. If adding or subtracting quantities, leave the same number of decimal places in the answer as there are in the quantity with the least number of decimal places
Three - all non-zero numbers are significant.
5 significant figures.
2 significant figures.
4 significant figures.
4 significant figures.
Two significant figures.
There are 5 significant figures in this number.
Three significant figures: 1,2,1.
There are 6 significant figures
Four significant figures.
One significant figure.
3
Six of them