Find the value of x.

24

12

35

117

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.

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Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.