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A Because if you do 156 x 20 it equals 3120. It’s A because the volume formula is Length x Width x height, And 156 and 20 were the only numbers given.
The first answer is the correct one
Divide fractions by multiplying the first number by the reciprocal of the second.
2ay*15y= 30ay^2
5y^3*4a=20ay^3
(30ay^2)/(20ay^3)=3/(2y)
Final answer: 3/(2y)