Abby is half as old as her dad, and twice as old as her brother. if her brother is 9 years old, how old is her dad? this is 10 points

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.

Identify the graph of y = ln x + 1.

Which inequality has a dashed boundary line when graphed ?