Problem
The speed of light in a vacuum is \( 299,792,458 \) meters per second. Which number, Written in scientific notation, is the best approximation of the speed of light? A \( 0.3 \times 10^{7} \) meters per second \( 30.3 \times 10^{8} \) meters per second - \( 3.0 \times 10^{7} \) meters per second \( 13.0 \times 10^{8} \) meters per second
Solution
Step 1 ：\( 299,792,458 = 2.997\times 10^{8}\text{ (adjust mantissa and exponent)}\)
Step 2 ：\(2.997 \approx 3.0\text{ (round to 1 decimal place)}\)
Step 3 ：\( 3.0 \times 10^{8} \)
