Question

which of the si prefixes is used to indicate (10^{-9})? multiple choice (\bigcirc) nano (\bigcirc) giga (\bigcirc) tera (\bigcirc) mega (\bigcirc) kilo

Explanation:

Recall SI prefixes: nano represents $10^{-9}$, giga is $10^{9}$, tera is $10^{12}$, mega is $10^{6}$, kilo is $10^{3}$. So nano matches $10^{-9}$.

Answer:

A. nano