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An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

What is the shape of the height and weight distribution