. Write the function only as shown in class notes a. The distance that a person can see to the horizon on a clear day from a point on the surface of Earth varies directly as the square root of the height at that horizon . point. A person who is 144m above the surface of Earth can see 18km to the b. The current in a simple electrical circuit varies inversely as the resistance. The current is 50amps when the resistance is 10 ohms. 5. When playing with a Skip-It toy, a child swings a weighted ball on the end of a string in a circular motion around one leg while jumping over the revolving string with the other leg. See illustration. The tension in the string varies directly as the square of the speed of the ball and inversely as the radius of the circle. The tension in the string is 6 pounds when the speed of the ball is 6 feet per second and the radius is 3 feet. a. Find the function b. Find the tension when the speed is 8 feet per second and the radius is 2.5 feet