1. How many feet are in 1 mile? (0.5 points) 2. In 2012, Felix Baumgartner jumped out of a balloon that was at an elevation of 127,851 feet above the surface. Convert this measurement to miles. (1 point)

3. The radius of the Earth is approximately 3,959 miles. How high above the center of the Earth was Felix when he jumped out of the balloon? (1 point)

4. A line that is tangent to a circle will always intersect the radius at what kind of angle? (0.5 points)

5. Use the Pythagorean Theorem to determine how far the horizon line is from Felix when he is in the balloon. (1 point)

6. On the ground, the surface of the Earth does appear to be flat. If the Earth was flat, how far was the horizon line from the launch site. Use the Pythagorean Theorem. (1 point)

7. If someone drove from the launch site to the end of Felix’s view on the horizon, the odometer would read 436.5 miles. Why is this number different than the answer in number 6? (0.5 point)

8. What is the angle, in radians, of the intercepted arc that Felix was viewing? (1 point)

9. If two people in balloons were released to the same elevation as Felix and could still see each other, how many radians would be between them? (1 point)

10. How many radians are in a complete circle? (0.5 points)

11. How many Felixes would it take to cover the circumference of the Earth so that one Felix could see the next, could see the next, see the next, and so on, and so on? (1 point)

12. If Felix were to look in a circle around his balloon, how many square miles of the Earth is he able to see? (1 point)

13. What is the formula to find surface area of a sphere? (0.5 points)

14. What is the surface area of the Earth in square miles? (1 point)

15. How many Felixes would it take to cover the entire surface of the Earth, so that one Felix could see the next, see the next, and so on, and so on. (1 point)