Question 1.5: How many significant figures do the following measurements h...

How many significant figures do the following measurements have?

  \begin {matrix} (a) 2730.78  m  & (b) 0.0076  mL & (c) 3400  kg & (d) 3400.0  m^{2} \end {matrix}

ANALYSIS All nonzero numbers are significant; the number of significant figures will then depend on the status of the zeroes in each case. (Hint: Which rule applies in each case?)

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(a) Six (rule 1; Zeroes in the middle of a number are significant.)
(b) Two (rule 2; Leading zeroes after a decimal point are not significant.)
(c) Two, three, or four (rule 4; Trailing zeroes with no decimal point may or may not be significant.)
(d) Five (rule 3; Trailing zeroes are significant if a decimal point is included.)

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