Help me if u can and pls :)

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?

Find the solutions for a triangle with a =16, c =12, and b = 63º

Describe the domain and range of y=2(3)^x-2+5