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

Asked by Snehal Pillai 30th July 2012, 8:18 PM
Answered by Expert
Answer:
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
Answered by Expert 2nd August 2012, 6:12 PM
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