Answer:
(D)Lucita's estimate is too high.
Answer:
i think the values for a and b are: a=2 and b=1/4
Answer: the answer is D = 210cm
I would answer about 1/3 cups
Answer:
If you are trying to simplify this, the answer would be: 
Hope this helps! If not, feel free to comment below and I'll see what else I can do to help. Thanks and good luck!