Answer :
Given:
The signal from a certain satellite takes approximately 0.0029 seconds to reach earth.
we will write the number in a scientific notation
The scientific notation is the number that is between 1 and 9 multiplied by 10 raised to an exponent
So, the given number will be:
[tex]0.0029=\frac{29}{10000}=\frac{29}{10}\times\frac{1}{1000}=2.9\times10^{-3}[/tex]