In scientific notation, 3.0 x 10-5 + 0.0000022 = A) 3.5 x 10-5
B) 3.22 x 10-5
C) 5.2 x 10-6
D) 3.5 x 10-6
E) 5.2 x 10-11

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?