You are laying an asphalt driveway. how much area must you cover if the driveway is 21 feet long and 10.5 feet wide?

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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?

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?