30 Each year the value of an investment increases by 2.5% of the previous year's value. The initial value of the investment was $500. Which equation gives the value of the investment y, in dollars, x years after the initial investment was made? A y = 500(0.25)* B y = 500(1.025) C y = 500(1.25) & 튼 D y = 500(2.5)*​

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