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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.

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .