One layer of Earth's atmosphere is called the stratosphere. At one point above Earth's surface the stratosphere extends from an altitude of 12 km to an altitude of 40 km. Enter a compound inequality to show the altitudes that are within the range of the stratosphere, use k as the altitude variable. Graph the solutions.

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Which is the focus of a parabola with equation y2=4x

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?