Can You help me please? What is the mean of the data set?

{21, 23, 25, 25, 26, 28, 28, 28, 31, 33}

A)26.8

B)27

C)27.8

D)28

Kathy spent 5/8 of her money on books and another 1/6 of her money on stationeries.what fraction of kathy’s money was left?

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.

Which of the following three dimensional figures has a circle as it’s base