An element with a mass of 700 grams decays by 6.1% per minute. To the nearest tenth of a minute, how long will it be until there are 220 grams of the element remaining?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?