How do you simplify (1-x-x^2-x^3)(1-x^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?

Find the solution(s) to x^2-14+49=0

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar