Rewrite the expression without using a negative exponent. 3z^-4
Simplify your answer as much as possible.

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

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.

The interior angles formed by the sides of a hexagon have measures that sum to 720°. what is the measure of angle a? enter your answer in the box. m∠a= °