Discover Questions

Metal and water? I believe is a varied carpet beetle but I wanted to make sure? Does it ever rain all day in Florida? The linear distance between two polluted streams on a map (Scale 1:67000) is 5 inches. What is the actual distance in Miles and Kilometers? How to calculate rank of a matrix {{2x, 2y, 2z}, {2x, 2y,2z-2}}?