What is the term to term rule of 64 32 16 8 4

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

Using elimination, what is -4x+2y=-12 4x+8y=-24

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319