simplify each expression using exact values (no decimals).?

[Eleese]

1) sq rt 20
2) sq rt 24
3) 2 sq rt 36
4) sq rt 250
5) sq rt 72
6) sq rt 50
7) sq rt 3 * sq rt 6
8) sq rt 4/25
9) sq rt -100
10) sq rt 375