Find the point that lies at two-fifths the length of the directed line segment from the point (1,1) to the point (11,6) . A. (5,3)
B. (9,5)
C. (3,2)
D. (6,3.5)

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.