Question

Rewrite the following statement using a number in scientific notation.

The diameter of a certain bacterium is about
0.00000002
0.00000002 meters.

Answer 1

$\bf 0.\stackrel{\textit{8 decimals}}{00000002}\implies 2.0\times 10^{-8}~meters$

since 2 is the first significant digit, a nonzero, then we move the dot that way, it just so happen it's 8 spots to the right.