How do you write $0.000 00007210$ $0.000 000 072 10$ in scientific notation?

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Answer 1 · 2016-06-03T22:47:05

$7.21 \times 10^{- 8}$ $7.21 xx 10^-8$

As this is a small decimal the index of 10 is negative.
There must be only one digit before the point.

How do you write 0.000000072100.000 000 072 10 in scientific notation?