(2 points)
Agustin can hold his breath for 90 seconds at a time. He did this 5 times this week. He used fractions and multiplication to calculate how many minutes he held his breath this week in total.
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90 seconds is equivalent to
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minutes.
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The mixed number above multiplied by 5 is
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minutes.
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90 seconds is equivalent to 1.5 minutes.
1.5 minutes x 5 = 7.5 minutes
Therefore, Agustin held his breath for a total of 7.5 minutes this week.