To write 0.00009 in scientific notation, follow these steps:
1.Move the decimal point: Convert 0.00009 to a number between 1 and 10 by moving the decimal point.
0.00009 becomes 9 when you move the decimal point 5 places to the right.
2.Determine the exponent: Since you moved the decimal point 5 places to the right, the exponent will be -5.
3.Combine: Write the number in scientific notation as