Can someone help me on this and i will help u on one that ur stuck on, cuz im kinda confused on this

Answer:
8900 meters
Step-by-step explanation:
Cuz u move the decimal place back by 3
Answer:
8900 meters
Step-by-step explanation:
well since the 10 is to the 3rd power, you move the decimal three places to the right, if it were to be negative you would move it 3 to the left, how that helps for furture referces