Answer:
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Step-by-step explanation:
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<span>In the form of a/b = c/d in proportions in math,
the outer terms are called the extremes and the inner terms are called means.
In the given 3/4 = 15/20, the outer terms or the extremes are 3 and 20.</span>
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The answer that would best tell the combination of shapes that could make a piano are: 3 cylinders and a rectangular prism
<h3>How to find the shape of a piano</h3>
The shape of a piano can be gotten from the way that the piano is built. A piano is known to have a shape that is like a chord, it also has the parts that is built like a rectangular prism.
In order to get the volume of the object, the different shapes that it has would be calculated individually using their formula.
Read more on volume
brainly.com/question/1972490
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