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

Question

2703 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-06-03T22:47:05

$7.21 xx 10^-8$

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 0.000 000 072 100.000 000 072 10 in scientific notation?