The lengths of a certain species of fish are approximately normally distributed with a given mean jl and standard deviation o. According to the Empirical Rule, what percentage of the fish will have lengths within 1 standard deviation of the mean?
34%

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?