What is 347500 rounded to the nearest 1000

Find the amount of simple interest earned for depositing the given principle in an account if $2200 is invested at 5.5 % for 6 months

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

Line a is parallel to line b, m2=4x+44, and m6=6x+36. find the value of x.