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Ikuo practiced his violin for 1,500 seconds. He practiced his piano for 28 minutes. Which instrument did Ikuo practice longer? Explain how you know.

Answer :

In order to compare both numbers, we must convert the seconds into minutes. Since 1 minute has 60 seconds, we can state the following rule of three:

[tex]\begin{gathered} 1\text{ minute --------- 60 seconds} \\ \text{ x ---------- 1500 seconds} \end{gathered}[/tex]

Then, by croos-multiplying our numbers, we have

[tex]60\cdot x=(1\text{ minute)( 1500 seconds)}[/tex]

Then, by dividing both sides by 60, we get

[tex]\begin{gathered} x=\frac{(1\text{ minute)( 1500 seconds)}}{(\text{ 60 seconds)}} \\ x=25\text{ minutes} \end{gathered}[/tex]

Therefore, by comparing 25 minutes for the violin with 28 minutes for the piano, the answer is: the piano

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