Can you explain why 16(1/2) 4 squared equals 1?

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

Do 12/14 and 8/10 have the same value? explain your answer.

[15 points, algebra 2]simplify the complex fraction and find the restrictions.