The data sets show the test scores of a group for the last two tests.
Test 1:{75, 75, 85, 80, 65, 70, 65)
Test 2: {95, 85, 85, 90, 90, 95, 100}
Which data set had the smaller standard deviation?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

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D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°