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Fractions
Mathématiques
Middle School Math
Fractions

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 Name _____________________________ Date ___________________
Fractions
Complète.

 1 Un feu de forêt récent près de Petiteville a détruitthree-fifthsof the trees in Bigtree National Forest. The forest covers3070km2. There is now about40tonnes de bois récupérable par km2in the burned area. The part of the forest that was not destroyed by fire will not be open to the salvagers. Assuming the trees are evenly distributed throughout the park, about how long will it take to remove all the salvageable wood at a rate of58 1/2tons per day? Round your answer to the nearest whole number.
 2 Ifun tiersof all type-Y organisms are bristly andeight-ninthsof all type-Y organisms are wrinkly, what is the maximum number of type-Y organisms that are neither bristly nor wrinkly out of a sample population of1,520?
3.  In an introductory biology lab, students are asked to determine the average length of the red earthworm. Working in teams, they reported the data in Table 1. At the end of the experiment, the teams combined their data to find the overall average. What was the overall average? Round your answer to the nearest tenth.
Table 1
 Team # Average length (cm) # of worms measured 1 6 1/6 4 2 5 1/3 4 3 5 3/7 5

 4 One-third of the class grew peas, one-third grew carrots, and one-third grew beans. The class consisted of63students of whichfour-seventhswere girls. The teacher chose the three groups to be as equal in their boy-girl composition as possible. How many boys and girls were assigned to each team?
 5 Some sea turtles can swim ten90times faster than tortoises can walk. Based on this information, if a sea turtle can swim at a rate of25MPH, at what rate can some tortoises walk? Express your answer as a fraction.
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