#### 2.47
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- \( e^{-1.05} \approx 0.3499 \).
- \( N(15) = 100,000 \times 0.3499 = 34,990 \).
- #### 34990A soil scientist is analyzing three plots of land to compare soil organic matter content. Plot A has 2.4% organic matter by weight, Plot B has 3.1%, and Plot C has 1.9%. She collects a 500-gram soil sample from each plot and mixes them all into a composite sample. What is the percentage of organic matter in the composite sample?
- #### 2680
- #### 18000
- #### 5.18
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