Below is a drawing of a fossil that is millions of years old. This fossil was just taken out of the ground, and no one knows wha
t kind of organism it is. One way scientists identify a fossil of an animal with bones is to compare the bones of the fossil to the bones of other animals.
Do any of these fossil’s bones look like bones of other animals? Describe your thinking.
Do any of these fossil’s bones look like bones of other animals? Describe your thinking.
2 answers:
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Answer:
Explanation:
We recognize that total occurrence equals new cases of disease over time divided by the number of people at risk at the onset.
Mathematically:
Given that:
Number of the population at risk = 1000 individuals
New cases during Jan 1 - Dec 31 = 60 because;
At 20 occurred on June 30 & 40 on Sept. 30) & no new cases were identified after that:
∴