Question
Mon July 30, 2012 By: Snehal Pillai

add 3 X 10-6 to 4.2 X 10-5 with due regard to significant figures

Expert Reply
Thu August 02, 2012
3 x 10-6 = 0.000003
4.2 x 10-5 = 0.000042
 
Both of these have basically the same number of significant figures, thus:
 on adding: 0.000045 = 4.5 x 10-5
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