Clara estimates that the length of a hiking trail is 5. 75 kilometers. She later learns that its actual length is 6. 25 kilometers. What is the percent error in Clara's estimate, to the nearest tenth of a percent? 7. 7% 8. 0% 11. 0% 11. 5%.

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.