Answer
The time delay was 2.56 seconds.
Work Step by Step
We can use $384,400~km$ as the distance between the Earth and the moon. We can find the time for EM waves to travel twice this distance:
$t = \frac{2d}{c}$
$t = \frac{(2)(3.844\times 10^8~m)}{3.0\times 10^8~m/s}$
$t = 2.56~s$
The time delay was 2.56 seconds.
