Diameter of a red blood cell is $0.000007$ m. In standard form, this is

Diameter of a red blood cell is $0.000007$ m. In standard form, this is
  1. $7 \times 10^{-5}$ m
  2. $7 \times 10^{-6}$ m
  3. $7 \times 10^{-7}$ m
  4. $7 \times 10^{6}$ m

Solution

Move the decimal 6 places to the right to get $7$. So $0.000007 = 7 \times 10^{-6}$ m.

Asked in: NSO

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