DJ Erin is making a playlist for work; he is trying to decide what 10 10 songs to play and in what order they should be played. Step2of2:

DJ Erin is making a playlist for work; he is trying to decide what

songs to play and in what order they should be played.

Step 2 of 2 :  If he has his choices narrowed down to country, pop,  disco, and  hip-hop songs, and he wants to play all disco songs, how many different playlists are possible? Express your answer in scientific notation rounding to the hundredths place.