Frank is choosing a 2 letter password from the letters a b c d and e. the password cannot have the same letter repeated in it. how many such passwords are possible

Consider the graph of the exponential function y=3(2)×

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.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees