Sari has 3 times as many pencil erasers as sam. together, they have 28 erasers. he may erasers does sari have

Answer for 10 points show work you guys in advanced < 3

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.

Describe a situation where it would be beneficial to round decimals to the nearest dollar. explain why you would use rounding in that situation.