19. A grain of rice has a volume of 20°m³. A box full of rice has a volume of 20 3m3. How many grains of rice are there in the box? C. 6,400 A. 64,000,000 20. A seed on a dandelion flower weighs 15 grams; A dandelion itself can weigh up to 153 grams. How many B. 64,000 D. 640 times heavier is a dandelion than its seed? A. 15° В. 151 С. 156 D. 15°

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