practice

  1. Write something.
  2. In order to extract the maximum flavor in the shortest amount of time, your local fast food purveyor has decided to brew its coffee at 90 °C and serve it quickly so that it has only cooled down to 85 °C. While this may be economically sensible, it is negligent and dangerous from a health and safety standpoint. Water (which is what coffee mostly is) at 85 °C is hot enough to cause third-degree burns (the worst kind) in two to seven seconds. You decide to add ice cubes to your coffee to cool it down to a more reasonable 55 °C so you will be able to drink it sooner. (Watery brew be damned. You need your caffeine fix immediately.) How many 23.5 g ice cubes at -18.5 °C should you add to your 355 ml cup of coffee to accomplish your thermal goal?
  3. Write something different.
  4. Write something completely different.

conceptual

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numerical

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algebraic

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calculus

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statistical

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investigative

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worksheets

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