Answer:
Step-by-step explanation:20
1) 400
2) 62
3) i want to say 4.5%
Step-by-step explanation:
I think 7=2, 6=-2, 4=23, 8=-7, 3=9, 1=12, 2=0, 5=7, 10=8, 11=3, 12=-45, 9=25
I tried my best