In the square below, the two semi-circles are congruent. Find the area of the shaded region. If necessary, round your answer to two decimal places.

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

How to do this , and can some one explain

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?