Work out the difference between 5/9and4/9

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?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Write and solve a real word problem that involves determining distance on a coordinate plane