Find the solution set to this inequality:
a, b, c, or d

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.

Given this information, which expression must represent the value of b?

What is the 12th term of b(n)=-4-2(n-1)