Write this number in standard form.
256,937.082

Arandom high school question but a hard one

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

X2 + y 2 = 36 x + y = 6 solve the system of equations.