Please help with this Geometry problem! Find the arc or angle marked with a ? in the picture.

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 required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Find the least common denominator for thesetvo rational expressions.n^2/n^2+4n+4 -3/n^2+7n+10