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You are standing on a sidewalk and watching a parade pass by. Here are the observations you make: 

1. For the first 10 minutes, 80 people walk by you per minute. 

2. This rate decreases by 25% for the next five minutes. 

3. This rate decreases by 50% for the next five minutes. 

How many people passed by you?

 Aug 10, 2016
 #1
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                                                         10 x 80 = 800    first ten minutes

80 x .75 =60 each minute x 5                           300

60 x .50 = 30 each minute x5                           150

______________________________________________

                                                                       =1250 people

 Aug 10, 2016

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