Question

A scientist measured the wavelength of an X-ray as 0.0000000065 meters. ​ ​Write the number in scientific notation.

Answer 1

Answer:

$6.5 \times 10^{-9}$

Step-by-step explanation:

The scientific notation of a number is to express the number in the form $x\times 10^{y}$ where x is the base of ten.

So, if we want to express the number 0.0000000065, then we can write it as

$\frac{6.5}{1000000000} = 6.5 \times 10^{-9}$.

So, we can write 0.0000000065 as $65\times 10^{-10}$ or $0.65 \times 10^{-8}$ but those are not the scientific notation.  

Therefore, $6.5 \times 10^{-9}$ is the scientific notation of 0.0000000065. (Answer)