Question

How do you write 0.000189 in scientific notation?

Answer 1

`1.89xx10^-4`

Explanation:

Take the decimal point and move it to the right until you pass the first non-zero digit (in this case number `1`) stop there and get rid of the zeros.
Count the movements of the point and use this value as NEGATIVE power of `10` that you'll use as a multiplicator.
You get:
`1.89` and 4 movements of the point.
so you get: `1.89xx10^-4`

Remember if you move the point to the right the exponent of `10` will be negative (as in this case). If you move it to the left it will be positive.
Ex. `1,890,000=1.89xx10^6`