# How do you express 0.0000000000709 in scientific notation?

$7.09 \times {10}^{-} 11$
To express this number in scientific notation form we need to move the decimal place $\textcolor{red}{11}$ places to the right which means we will have a negative exponent in the 10's term.
$0 \textcolor{red}{.00000000007} 09 \to$
$7.09 \times {10}^{-} 11$