The speed of light in vacuum is defined to be exactly 299,792,458 meters per second. Exact quantities have an infinite amount of significant digits. To reduce the expression to 2 significant digits, we take only the first two digits starting at the leftmost digit as accurate and round the quantity represented by the first 2 digits in their place value up if the third digit is greater than 5 or down if the third digit is less than 5. The reason for doing this is that we want the result to be the closest number of the two possible choices to the original value.
For this reason, if the third digit is 5, consider the value of the fourth digit instead, as this will tell you whether rounding up or rounding down will give you the closest number. If the fourth digit and all the rest of the digits are 0, then both rounding up and rounding down are the same distance from the original number, and it is up to your local convention which one you choose to do.
For this number, the first two digits, keeping their place value, gives us the number 290,000,000 meters per second. The third digit in the original number is 9, so we round 290,000,000 up to 300,000,000 meters per second.
It is difficult to tell how many digits are significant in standard notation, so most publications use scientific notation. We would write it as 3.0x10^8 meters per second instead, where we explicitly write 2 significant digits including the significant 0 as the multiple of 10^8.
The speed of light is 299 792 458 m/s To 3 significant figures will just be 3.00 x 10^8
299,792,458.00000 meters/second
To make different decimals, add as many zeros as you like.
-- 186,000 miles per second
-- 299,000 kilometers per second
186000 miles per second
299792500 m/s
2.998 x 10^8 m/s
186000 miles per second to 3 sig figs.
2.997925 x 108 meters per second.
299,792,458 meters per second.
Non-zero digits are always significant, so the number 12 has two significant figures.
2 significant figures.
2. sig figures, because there is not a sig. fig in front of a dot. 100% Yes - all the zeroes to the left of the 3 can be neglected. There are 5 decimal places but only 2 significant figures.
Significant digits are digits that provide useful information, for instance 123 has 3 significant digits and 30010 has 4 significant digits. So basically zeros aren't significant unless they are between two other numbers. 0.1020 has only 4 significant digits. A+: 4
significant figures are digits of certainty. In other words they are exact numbers. Except zeros are placeholders (not exact) unless if they are in between non zeros. Also zeros at the end of numbers are significant figures if there is a decimal point.
There are two significant figures in 0.025.
there are 2 significant figures in 21000 2 & 1 are the significant figures.
It is 1300 rounded to 2 significant figures
2 significant figures.
There are 2 significant figures.
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
It is then 0.067 when rounded to 2 significant figures
Trailing zeros ALWAYS count as significant figures, so 700.0 would have 4 significant figures.
2 significant figures.
0.04567 to 2 significant figures is 0.046
2 significant figures
2 significant figures.