An anthropologist finds bone that her instruments measure it as 0.526% of the amount of carbon-14 the bones would have contained when the person was alive. how long ago did the person die?

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?