A serving of skinny popcorn has 4 grams of fiber. This is about 16% of the recommended daily amount of fiber. How many grams of fiber are in the recommended daily amount?

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.