Please help! Answer as many as possible!

Answer: 1. 10^3
One thousand
2. 10^5
One Hundred Thousand.
3.10000 4.2000 5. 60000
6. 7
70
700
7000
70000
7.12
120
1200
12000
120000
8. 9 × 1
9 × 10
9 × 100
9 × 1000
9 × 10000
9. value= 20
Step-by-step explanation: