Which expressions are equivalent to the one below 64^x
a.8^2*8x
b.(8*8)x
c.8*8^2x
d.8*8x
e.8^2x
f.8^x*8^x

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?