What’s the correct answer for this?

Two parallel lines are crossed by a transversal.what is value of x

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

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.