Patterns & would like to know if this is being done correctly and need some with the last 2 questions . in advance!

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

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.

Factor the following expression completely 6x^11-24x^7