Mathematics, 16.04.2020 22:31 7841784
A schoolteacher is worried that the concentration of dangerous, cancer-causing radon gas in her classroom is greater than the safe level of 4pCi/L. The school samples the air for 36 days and finds an average concentration of 4.4pCi/L with a standard deviation of 1pCi/L. To test whether the average level of radon gas is greater than the safe level, the appropriate hypotheses are .
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Answer from: Quest
cheater
step-by-step explanation:
Answer from: Quest
24
step-by-step explanation:
the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is
30% × 80 = 0.30 × 80 = 24
Answer from: Quest
The price decreased by 40 percent㏒㏒㏒㏒㏒㏒㏒㏒㏒㏒㏒㏒㏒∞㏒∞㏑⊕⊆⊂ф
Answer from: Quest
correct answer is b. 27/8
step-by-step explanation:
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A schoolteacher is worried that the concentration of dangerous, cancer-causing radon gas in her clas...
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