Answer: [tex]2.5 \times 10^{-9}[/tex]
Step-by-step explanation:
Given : The width of a DNA molecule = 2.5 nanometers.
A nanometer = 0.000000001 meter.
In scientific notation it will be
A nanometer = [tex]=\dfrac{1}{1000000000}=10^{-9}[/tex] meter
⇒ 2.5 nanometers= [tex]2.5 \times 10^{-9}[/tex] meters
Therefore , the width of a DNA molecule =[tex]2.5 \times 10^{-9}[/tex]
We use scientific notation to express a very big or a very small number in the product of a decimal ( between 1 and 10) and powers of ten.
