How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/31100.0*Average seed
McLean 5 Briar Woods 8 +0.7
Broad Run 5 Dominion/Potomac Falls 4 +0.1
Kettle Run/Liberty 2 Loudoun Valley/Woodgrove 3 +0.1
Stone Bridge 4 Langley 2 -0.1
Patriot 10 Battlefield 7 -0.1
Loudoun County/John Champe 6 Flint Hill 13 -0.0
Week of 2/7100.0*Average seed
Briar Woods 5 Stone Bridge 6 -0.8
Patriot 5 Yorktown 1 +0.3
Week of 2/14None

What If

Chances based on how well the Briar Woods finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-L-Tplayoffs12345678910111213141516171819202122Count
120-0-0In100608,406,760
Total:In100608,406,760
Games Above .500
Chance Will Make Playoffs