What is 1.92 as a fraction in simplest form

Identify the parent function that can be used to graph the function f(x)= (1/4x)^3

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