What percent is earth is salt water

Can someone me with this plz? ! i'm putting 20 points on it!

How did the environment influence settlement patterns in colonial america? * 1 point a. early settlers stayed near rivers for farmland and transportation b. early settlers stayed in hilly areas to avoid frequent floods in coastal areas c.early settlers quickly moved to the mountains to avoid hot summers d. early settlers only lived on coastal islands to prevent indian attacks

Approximately how close is russia to alaska ? a.5 miles b.50 miles c.500 miles d.5000 miles