Half Life and Doubling (Solve for t) May 07, 10:15:52 PM
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Element X is a radioactive isotope such that every 22 years, its mass decreases by
half. Given that the initial mass of a sample of Element X is 1200 grams, how long
would it be until the mass of the sample reached 800 grams, to the nearest tenth of a
year?
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What is the probability of rolling a single die greater than 4

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

Multiply and simplify. 2x^2 y^3 z^2 · 4xy^4 x^2 i will mark you brainliest if right. show how you got the answer, !