Question

How do you write 450,000,000 in scientific notation?

Answer 1

450,000,000 `= 4.5 xx 10^8`

You need to choose a power of `10` such that the mantissa lies in the range `[1.0, 10.0)` or `(-10.0, -1.0]`

Answer 2

Count the number of times you have to move the comma to the left 'til you reach the point you leave the first digit to its right. This number of moves will be the exponent of 10.

`450,000,000=4.5·10^8`