A.when its between two digits
B.When it is right to the right of the decimal and it follows a non-zero digit.
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Only one of them is significant. The leading zero (zero to the left) is not significant. The trailing zero (rightmost) is significant. To recap, only the zero following the seven is significant. See the related links for a really good article on significant digits.
Depends on the place the 'zero' is in a given number. '10' Zero is significant ificiant 010 The prefix zero is insignificant. 10.01 Both zeroes are significant 10.010 The suffix zero in insignificant
0.7 has one significant figure. Any non-zero digit is significant (165 has three significant figures). Any zero between non-zero digits is significant (304 has three significant figures). Any zero to the right of a non-zero digit in a number which includes a decimal point is significant (10,000 has one significant figure, .0001 has one significant figure, but 100.0 has four significant figures, as does 0.001000). In this case, only the 7 is significant.
Three significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
They are all significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.