11. Model Real Life You want to stack 7. cups in \( \frac{1}{4} \) minute. Your first attempt takes \( \frac{1}{2} \) minute. Your second attempt takes \( \frac{3}{10} \) minute less than your first attempt. Do you meet your goal? Explain.
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The Deep Dive
In your quest to stack 7 cups within \( \frac{1}{4} \) minute, let's first break down your attempts. Your first attempt took \( \frac{1}{2} \) minute, which is 0.5 minutes. For your second attempt, you improved and completed it in \( \frac{1}{2} - \frac{3}{10} \) minutes, which calculates to \( \frac{2}{5} \) minutes or 0.4 minutes. Adding the time of both attempts together, we have \( \frac{1}{2} + \frac{2}{5} = \frac{10}{20} + \frac{8}{20} = \frac{18}{20} \) minutes, or 0.9 minutes. Since 0.9 minutes is greater than \( \frac{1}{4} \) minute (which is 0.25 minutes), unfortunately, you did not meet your goal. Just remember, even if you didn’t succeed this time, practice makes perfect! Keep stacking, and you’ll be timing those cups like a pro in no time!