Pls help me with the question?

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

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school