-7/24, because you can just do this question in reverse to figure out an answer. (3/8 - 2/3)
Got this from a quizlet
the answers B : <B~=<Y
ABC~ZYX by the SAS similarity theorem.
Answer:
The green would take 4 and the blue would take 16 times respectivly. I did it by finding the volumes of the cups in terms of pi, then dividing it by the volume of the sink.
Step-by-step explanation:
So the volume of the whole half sphere is 512pi.
Now we have to find the volumes of the cup.
Equation: 
Blue cup:

It would take 16 times to drain it completly.
Green cup:

It would take 4 times to drain it completly.