The radius of Neptune, approximately 15,300 miles, can be expressed in scientific notation as \( 1.53 \times 10^4 \) miles.
Here's how that is done:
- Move the decimal point in 15,300 two places to the left to get 1.53.
- Count how many places you moved the decimal point (which is 4).
- Thus, you express it as \( 1.53 \times 10^4 \).