The digit 5 in which number represents a value of 5 thousands?

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?

Could someone with number 1 and 2

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*