If you are 20 years old, you have been alive for about 630 , 000 , 000 seconds. write this number in scientific notation.

6.3 * 10^8

To get this answer, you write the decimal point between the first two nonzero digits, which are 6 and 3. Then you need to count how many spaces it takes to move the decimal point so that it gets back to where it originally was, which was after the long string of 0's. You should count out 8 spaces, so the exponent over the "10" is going to be 8. The exponent 8 says "move the decimal point 8 spots to the right. The positive exponent means "move right"

i dont know

step-by-step explanation: