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 3 years ago
how to correct to 3 significant figures to these values
a)20.961
b)0.275
c)15.62 and 3.555
 3 years ago
how to correct to 3 significant figures to these values a)20.961 b)0.275 c)15.62 and 3.555

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Rogenhamen
 3 years ago
Best ResponseYou've already chosen the best response.0a) 21.0 Round the 6 up to get 21, then add a 0 after the decimal. 0's after the decimal count as a sig fig. b)0.275 is correct, 0's in front of the decimal place just help to show you where it is and don't count toward sig figs. c)15.6 Only round up numbers when they're 5 and up. d)3.56 Numbers 5 and above round up.

barnes
 3 years ago
Best ResponseYou've already chosen the best response.1Significant figures comes down to a short list of rules: 1) ALL nonzero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 2) ALL zeroes between nonzero numbers are ALWAYS significant. 3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant. 4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant. In your case: 20.961 > round up to 20.1 0.275 = 3 sig figs, no need to fix. 15.62 > Round to 15.6 3.555 > Round to 3.56 Blatant copy and paste from this lovely source: http://www.usca.edu/chemistry/genchem/sigfig.htm

Rogenhamen
 3 years ago
Best ResponseYou've already chosen the best response.0@barnes 21.0 not 20.1.

barnes
 3 years ago
Best ResponseYou've already chosen the best response.1Typo...I refuse to accept I literally put that in intentionally. (I most likely did... :( )

Rogenhamen
 3 years ago
Best ResponseYou've already chosen the best response.0I'd give you another medal if I could, for effort.
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