What is 2 divided by one half

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.

Determine the relationship of ab and cd given the following points

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)