It takes jasmine 2 hours mow the yard. it takes her sister, kailyn, 3 hours to mow the yard. how long does it take to mow the yard if they work together? a) 1 hour b) 1 hour 12 minutes c) 1 hour 20 minutes d) 2 hours 12 minutes e) 2 hours 30 minutes

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.