Mathematics, 24.12.2019 19:31 myleefaustin
The mean biology score of all undergraduate students at a college in a given year is 67.8, with a standard deviation of 11.5. what is the standard error of the mean for a sample of 70 students?
Answers: 1
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About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?
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Mathematics, 21.06.2019 15:00
Use the graph to determine the range. which notations accurately represent the range? check all that apply. (–∞, 2) u (2, ∞) (–∞, –2) u (–2, ∞) {y|y ∈ r, y ≠–2} {y|y ∈ r, y ≠2} y < 2 or y > 2 y < –2 or y > –2
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Mathematics, 21.06.2019 18:00
Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
Answers: 3
The mean biology score of all undergraduate students at a college in a given year is 67.8, with a st...
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