On which day did kay bike a whole number of miles?

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.

(60 points) explain this in detail

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)