Which sentence BEST states the theme of the story

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

What is the total surface area of this square pyramid?

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply