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Lesson 63 & 64

Lesson 63 & 64. Changing Rates Semicircles. Rates. ratios that show how things change best example: speed number per unit of time. Distance Equation. distance = rate x time how do we solve for: distance? rate? time?. Example 63.1.

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Lesson 63 & 64

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  1. Lesson 63 & 64 Changing Rates Semicircles

  2. Rates • ratios that show how things change • best example: speed • number per unit of time

  3. Distance Equation distance = rate x time how do we solve for: distance? rate? time?

  4. Example 63.1 Prince Charming traveled 60 leagues in 2 days. Then, he doubled his rate. How long would it take him to go 300 leagues at this new speed?

  5. Example 63.2 The machine could cap 500 bottles in 2 hours. If the rate of the machine were tripled, how many bottles could be capped in 10 hours at the new rate?

  6. Example 63.3 Raul ran 6 miles in 2 hours. Then, he ran 20 miles in 4 hours. By how much did his rate increase?

  7. Semicircles • half a circle • arc: part of the circumference of a circle • arc length: length of an arc • a semicircle is one half the circumference of the whole circle

  8. Example 64.1 • Find the perimeter and the area of this figure:

  9. Example 64.2 • Find the perimeter and area of the figure. Dimensions are in centimeters.

  10. Homework • P.S. 64 • 1-30 all

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