It has two significant digits.
Two of them.
Two of them which are 1 and 2
It has 3 significant digits.
4
It has two significant digits.
Any measurement may have two significant digits.
When using significant digits, the product has only the number of significant digits as the lowest number in the factors. "20" has two significant digits and "310" has three. Therefore, the product has to have two significant digits. 310 × 20 = 6200 6200 already has two significant digits.
There are two significant digits in the number 83.
Two significant digits, the 7 and trailing 0.
Two. All nonzero digits are significant.
Three: The first two zeros are not significant digits.
The number 48 cm has two significant digits. The leading 0 is not significant in this case.
Two significant figure
There are two.
Non-zero digits are always significant. Thus, 569 has three significant digits, and 69.35 has four significant digits. Zeros are sometimes significant and sometimes aren't: # Zeroes placed before other digits are not significant; 0.0968 has three significant digits. # Zeroes placed between other digits are always significant; 70063 kg has five significant digits. # Zeroes placed after other digits but behind a decimal point are significant; 7.90 has three significant digits. # Zeroes at the end of a number are significant only if they are behind a decimal point as in (c). Otherwise, it is impossible to tell if they are significant. For example, in the number 8200, it is not clear if the zeroes are significant or not. The number of significant digits in 8200 is at least two, but could be three or four. To avoid uncertainty, use scientific notation to place significant zeroes behind a decimal point: 8.200 * 103 has four significant digits 8.20 * 103 has three significant digits 8.2 * 103 has two significant digits
2.99 rounded to three significant digits is 2.96 2.99 rounded to two significant digits is 3.0