If z^n = z√, what value of n makes this equation true?

What is the value of the digit 1 in the number 13?

Does the point (1, sqrt 7) lie on circle shown.

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?