Which expression is equivalent to the given expression? (3m^-4)^4(3m^5)

A. 81/m^2
B. 27/m^7
C. 27/m^2
D. 81/m^7

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?