WILL GIVE BRAINLIEST FOR ANSWERCan someone answer these questions by their numbers? (9, 10, ect)

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?

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.