Answer:
Explanation:
Assume that after each shaking, a silver dollar has an equal chance of "head" or "tail" up.
There will be likely 100/2 = 50 dollar coins with "heads" up. Removing them leaves 50 coins.
Again after the second shakes, 50/2 = 25 coins will likely be "heads" up. Removing them leaves 25 coins.
After the third shakes, approximately 25/2 = 12.5 coins will be "heads" up. Of course there is no 0.5 coin. Rounding up you likely get to keep 13 dollar coins.
Answer:
Humans belong in the chordata phylum because they meet on the criteria listed on the chart (multicellular, tissues, vertebrae). Each requirement for each phylum also applies to the categories on the right. Because humans are one of the most complex life forms, it only makes sense that we're in the most complex phylum.
Messengers delivered letters because they had No Postal system
