The maximum distance that the light on a lighthouse can reach is 20 miles. If the light can rotate 360 degrees, find the total area that it can light. Use 3.14 for pi

What is the least common multiple of 6 and 17?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.