Write the number six and a half thousand in figures

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?

Which graph depicts the path of a projectile

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.