Please help me answer this

Peaches cost $4.29 per pound. find the cost of two and a quarter pounds of peaches.

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?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression