Mathematics, 29.09.2019 23:30 camilacarrielh15
For a study on a new cold medicine, a group of 100 participants with cold symptoms was studied for one month in the spring. one-fifth of the participants were given the cold medicine, and the rest of the participants were given a placebo, a pill that has no active ingredients. of the participants that were given the medicine, 70% felt improvement of their symptoms. of the participants that were given the placebo, 80% felt improvement of their symptoms. what is the probability of randomly choosing a participant who took the placebo, given they did not feel improvement?
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Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?
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Acircle is centered at the point (5, -4) and passes through the point (-3, 2). the equation of this circle is
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