The claim is that the white blood cell counts of adult females are normally distributed, with a standard deviation equal to 1.96. A random sample of 45 adult females has white blood cell counts with a mean of 8.19 and a standard deviation of 2.03. Find the value of the test statistic.

3(10x-y)-5(x-y^2) need this solved asap

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?