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Apiano has 88 keys. the ratio of white keys to black keys is 13.9. how many black keys does a piano have?
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Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents
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Apiano has 88 keys. the ratio of white keys to black keys is 13.9. how many black keys does a piano...
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