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4. If you are given a sample containg 1.204 x 10 24 molecules of NaCl, what is its weight in grams? How do i find the range of f(x): 1 / (x^2 + 7) ? Give an example of a function f and a set A such that A is bounded above and below, but f(A) is unbounded.? Modeling with linear equations help? Can I take a 10mg melatonin vitamin with a unisom sleepgel that contains 50mg of diphenhydramine HCI ?