Dr. Patricia Bath is an ophthalmologist and inventor who became the first African-American woman to receive a patent for a medical invention. Bath holds four patents, the most notable being the Laserphobe Probe, a method of removing cataract lenses using a laser. The average human pupil is 0.25 cm. What is the total AREA of the circular pupil?

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?