A circular pool of water has a fountain in its center, as shown in the figure below. A man measures the circumference C of the pool. He then measures with a protractor the angle of elevation ϕ from the outer edge of the pool (level with the bottom of the fountain) to the top of the fountain's water spout. Find the height from the bottom of the fountain to the top of the water spout. (Use any variable or symbol stated above as necessary.)

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.