Alarge school district in connecticut wants to estimate the average sat score of this year's graduating class using a 95% confidence interval. the district takes a simple random sample of 100 seniors. the sample mean is 510 and the population standard deviation for sat scores is known to be 75. what is the 95% confidence interval for µ?

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?