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Lesson 49.notebook                                        January 14, 2013



             Lesson 49:

             FYI...We can solve rate problems 2 ways:
                 --with proportions (McDonald's arches)
                 --by multiplying by the unit rate
Lesson 49.notebook                                                       January 14, 2013


             Examples (Lesson 49):
             Solve the following by using a ratio box/proportion.

             A) If 5 pounds of seedless grapes cost $3.80, how much would 9
             pounds cost?
Lesson 49.notebook                                                          January 14, 2013



             B) If 8 cows eat 200 pounds of hay a day, how many pounds of
             hay would 20 cows eat in a day?
Lesson 49.notebook                                                       January 14, 2013



            C) Don can type 135 words in 3 minutes. At that rate, how many
            minutes would it take him to type 450 words?
Lesson 49.notebook                                                            January 14, 2013


             D) Find the price per pound of grapes in "a", the pounds of hay per
             cow in "b", and the words per minute in "c".
Lesson 49.notebook                                                         January 14, 2013




             E) Solve examples "a" & "b" again using a rate instead of a
             proportion.

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8th pre alg -l49--jan14

  • 1. Lesson 49.notebook January 14, 2013 Lesson 49: FYI...We can solve rate problems 2 ways: --with proportions (McDonald's arches) --by multiplying by the unit rate
  • 2. Lesson 49.notebook January 14, 2013 Examples (Lesson 49): Solve the following by using a ratio box/proportion. A) If 5 pounds of seedless grapes cost $3.80, how much would 9 pounds cost?
  • 3. Lesson 49.notebook January 14, 2013 B) If 8 cows eat 200 pounds of hay a day, how many pounds of hay would 20 cows eat in a day?
  • 4. Lesson 49.notebook January 14, 2013 C) Don can type 135 words in 3 minutes. At that rate, how many minutes would it take him to type 450 words?
  • 5. Lesson 49.notebook January 14, 2013 D) Find the price per pound of grapes in "a", the pounds of hay per cow in "b", and the words per minute in "c".
  • 6. Lesson 49.notebook January 14, 2013 E) Solve examples "a" & "b" again using a rate instead of a proportion.