1) the radius of the planet neptune is approximately 15,300 miles. how is this number of miles written in…

Explanation:

Step1: Recall scientific - notation form

Scientific notation is $a\times10^{n}$, where $1\leqslant|a|\lt10$ and $n$ is an integer.

Step2: Determine the value of $a$

For the number $15300$, move the decimal point to the left until we get a number between $1$ and $10$. So, $a = 1.53$.

Step3: Determine the value of $n$

We moved the decimal point $4$ places to the left. So, $n = 4$.

Answer:

$1.53\times10^{4}$