I need help with math homework

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

What is 32+4 x (16 x 1/2) -2 show your work}

What is the solution set of the quadratic inequality x^2-5< or equal to 0