Someone please help me. I will give Brainliest. No links, please.

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.

Which rational number could be graphed between -4 and -5

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.