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OpenStudy (anonymous):
Indira's photo come in two sizes: 13 cmx 9 cm and 15cm x 20 cm Are there proportional?
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OpenStudy (anonymous):
I dont think they are proportional because: \[\frac{ 13 }{ 9 }\] is not equal to \[\frac{ 15 }{ 20 }\] or \[\frac{ 20 }{ 15 }\]
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