What words related to the greek or latin word circum (v)-to sail around the world

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

How should the syntax in this sentence be changed, if at all? the scientists spent years analyzing the results of numerous medical studies meant to identify the cause of the disease. no change the scientists spent years looking at the results of a variety of different medical studies meant to locate the cause of the disease. the scientists spent years reviewing medical study results to find the cause of the disease. the scientists spent years studying the results of many medical studies in order to uncover the cause of the disease.

How to write the number 20.484.163 in expanded form