Spike, Jet and Faye stand at each corner of a triangular plot of land. Faye is 25 feet from Jet, Jet is 31 feet from Spike and Spike is 40 feet from Faye. Find the area of the triangular plot of land. Round your answer to the nearest square foot.

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