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How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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.

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2