## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$1.09 \times 10^{-5}$
To convert the given decimal to scientific notation, perform the following steps: (1) Move the decimal point 5 places to the right to obtain $1.09$. (2) To retain the value of the given expression, multiply $10^{-5}$ to the result in Step (1) above to obtain: $0.0000109 = 1.09 \times 10^{-5}$