# How do you write the answer in scientific notation given (2.6times10^-7)(1.3times10^2)?

$= \left(2.6 \times 1.3\right) \times \left({10}^{- 7 + 2}\right)$
$= 3.38 \times {10}^{- 5} \approx 3.4 \times {10}^{- 5}$ (rounding for significance)