The speed of light in a vacuum is 299 792 458 m/s what is this written in scientific notation

2.99792458*10^8 m/s.

To write the speed of light in scientific notation, we need to express it as a number between 1 and 10 multiplied by a power of 10.

The speed of light in a vacuum is 299 792 458 m/s.

To convert this number to scientific notation, we need to move the decimal point so that there is only one non-zero digit to the left of it. In this case, we move the decimal point 8 places to the left:
299 792 458 becomes 2.99792458

Since we moved the decimal point 8 places to the left, we need to multiply the number by 10^8 to maintain the value. So the speed of light in scientific notation is:

2.99792458 x 10^8 m/s