Paul has a collection of 36 marbles. he separated the marbles into 3 equal groups to share with his friends, but he decided to keep 2/3 of the marbles for himself. how many marbles will paul keep?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

What does the relationship between the mean and median reveal about the shape of the data

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