Why is br*inly so stingy w their answers i’m just tryna finish homework

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

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

The longer leg of a 30-60-90 trangle is 18