How much does one apple cost?
Ben paid $2.40 for 3 apples and divided 3 by 2.40, getting 1.25. He computed apples per dollar instead of dollars per apple.
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1 lesson for “Unit rates”
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What is sin of a 30-degree angle on the unit circle?
On the unit circle, every point's coordinates are (cos, sin). Learn a few landmarks and the special angles are solved.
Try this lessonIs a catalyst used up, or does it just help?
A catalyst helps a reaction finish faster without being used up. Learn the one quantity it lowers, and what it never changes.
Try this lessonIs it rise over run or run over rise?
Kai found the slope through (2, 3) and (6, 11) and wrote 1/2. He divided the run by the rise.
Try this lessonWhy is a mole not a weight?
A dozen is 12. A mole is 6.02 x 10^23. Practice dividing particle counts by Avogadro's number, and learn why the mole is not a weight.
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