Find the total balance of each investment account earning simple annual interest.

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Here is another math questions. i will keep asking different questions. 4^2x=6

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.