Question

which value is associated with the prefix nano-?
a) billion
b) one-millionth
c) one-thousandth
d) one-billionth

Explanation:

In the metric system, the prefix "nano - " represents a factor of $10^{-9}$, which is equivalent to one - billionth. Option A (billion) is $10^{9}$, option B (one - millionth) is $10^{-6}$, and option C (one - thousandth) is $10^{-3}$, so the correct value associated with "nano - " is one - billionth.

Answer:

D) one - billionth