In her first 30 bat appearance, Lucile hit nine hits. What is her batting average? (Relative frequency).

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.)

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

How can you find the mean absolute deviation (mad) for this set of data?