The table shows the wavelength of the sound produced by keys on a piano x keys away from the a above middle c.
using the exponential regression model, which is the best prediction of the wavelength of the key that is 8 above the a above middle c?

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If f(x)= 3x+6 which of the following is the inverse of f(x)

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.