Question

how do you write 0.000090 in scientific notation?
× 10

Explanation:

Step1: Move decimal point

Move the decimal point to the right until we have a number between 1 and 10. For 0.000090, moving the decimal 5 places to the right gives 9.0.

Step2: Determine exponent

Since we moved the decimal point 5 places to the right, the exponent of 10 is - 5.

Answer:

$9.0\times10^{-5}$