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Mathematics, 21.06.2019 15:00
Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race
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Mathematics, 21.06.2019 19:30
Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = ā3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, ā6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (ā5, 1) is y = 1.
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There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?
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Mathematics, 21.06.2019 22:50
Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables
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