Kelsey measured the sides of a porch to determine if it is a right triangle. does her porch with side lengths of 42 feet, 56 feet, and 70 feet form a right triangle?

yes, because 1st picture
yes, because 2nd picture
no, because 3rd picture
no, because 4th picture

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95