HELP FOR BRAINLIEST Use the data about the weekly salaries of employees at two small companies.

Company​ A: ​$520​, ​$540​, ​$560​, ​$540​, ​$590
Company​ B: ​$470​, ​$460​, ​$460​, ​$490​, ​$870

What is the mean weekly salary at each​ company?

Four of the 5 employees at Company B each received a raise of ​$30. After the​ raises, how much greater is the mean of the salaries for Company B than Company​ A? Explain how to solve the problem.

The mean weekly salary is ​nothing at Company A and ​nothing at Company B.