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Warm Up

Warm Up The ratio of boys to girls in a classroom is 5:3. If there are 15 boys in the class, how many girls are in the class?.

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Warm Up

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  1. Warm Up The ratio of boys to girls in a classroom is 5:3. If there are 15 boys in the class, how many girls are in the class?

  2. 1. One surveillance camera was able to capture an image of the robber as he went out the door. The image shows the thief standing next to the door. In real life the door measures 80 inches but it is only 16 centimeters in the picture. If the person in the photo is ____cm tall, how tall is suspect in real life? Report the height in feet and inches. Suspect A:__14_______________ Suspect B: __16______________ Suspect C: __14______________ Suspect D: __15______________ Suspect E: __14______________ Suspect F: __16______________ 5 x 14 = 70 inches, which is 5’ 10”

  3. 2. The robber stole ______ pounds of quarters out of the coin machine. Quarters are weighed in ounces. If there are 16 ounces in 1 pound, how many ounces of quarters were stolen? Suspect A:__25___________ Suspect B:__20__________ Suspect C:__20___________ Suspect D:__15___________ Suspect E:__14___________ Suspect F:__16__________ 25 x 16 = 400 ounces of quarters

  4. 4. The robber was able to clean out______ teller stations in 4 min. How long did they take to clean out all 12 of the teller registers? Suspect A:__1___________ Suspect B:__1___________ Suspect C:__3___________ Suspect D:__3___________ Suspect E:__2___________ Suspect F:__2___________ 12 x 4 = 48 minutes

  5. Write your answers to the following Pair with your shoulder partner and discuss your answers. Write down what they thought with yours. 1) If you were a real life detective, how would understanding proportions help you solve real problems? 2) What other clues could proportions solve in a real life “robbery”?

  6. 3. Each quarter weighs 0.2 ounces. How many quarters did the robber steal from the bank? Suspect A:_____________ Suspect B: ____________ Suspect C: ____________ Suspect D: ____________ Suspect E: ____________ Suspect F: _____________ 5 x 400 = 2,000 quarters

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