Explain how to find the missing side using one of the trigonometric ratios to find the missing side of the triangle and how to round your answer to the nearest tenth

What is the exact area of a circle with a diameter of 50 centimeters? a.87.9 square centimeters b.379.9 square centimeters c.1962.5 square centimeters d.4923.5 square centimeters

Aline that intersects one of two parallel lines intersects the other also always sometimes never

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?