#### 4500
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- After 1st: 500 × 3 = 1500
- After 2nd: 1500 × 3 = 4500
- Alternatively: 500 × 3² = 500 × 9 = <<500 × 9 = 4500>>4500
- 10Dr. Emily Carter is reconstructing a prehistoric forest. She estimates 180 seed-bearing plant fossils in a grid. 40% are gymnosperm seeds, 35% are angiosperm, and the rest are spore-producing plants (ferns). If she selects one fossil at random, what is the probability it is not a gymnosperm?
- Gymnosperms: 180 × 0.40 = <<180 × 0.40 = 72>>72
- Not gymnosperm: 180 - 72 = <<180 - 72 = 108>>108
