Which of the following graphs is the solution set of 1/2x+7>3?

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9