PLEASE HURRY! Use the diagram to answer the question. What is the measure of ∠A? Enter the correct value. Do not enter the degree symbol. (This is from Primavera. 60.07 is not correct, no matter how many times I try.)

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

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