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

Asked by Snehal Pillai | 30th Jul, 2012, 08:18: PM

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  | 2nd Aug, 2012, 06:12: PM

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