The next model of a sports car will cost 12.7% less than the current model the current model cost is 42000 how much will the price decrease in dollars what would be the price of the next model

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?