All ratios equivalent to 3:4

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?

On a piece of paper graph f(x)=5•(0.4)^x

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8