You have 5 different trophies to arrange on the top shelf of a bookcase. how many ways are there to arrange the trophies?

a. 120
b. 24
c. 720
d. 25

If wxyz is a square, which statements must be true? plz < 3

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

If the average of x, y and z is 15 what is their sum