In the year 1999, the surface elevation of Lake Powell was 3884 feet above sea level. In the year 2002, the surface elevation of Lake Powell was 3650.9 feet above sea level. Interpret the rate of change in this situation. The surface elevation of Lake Powell is decreasing at a rate of

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?