Find the missing exponent. n^3=n^×n^-3

Which of the following points is collinear with (-2,1) and (0,3)

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?

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.