Which two sentences does the author use to support the overall argument with facts? Statistics show that most vaccines are more than 90% effective in preventing diseases. Ultimately, people should take the time to educate themselves about the pros and cons of vaccines. Polio and smallpox are two examples of diseases that have been eliminated through widespread vaccination. However, when people are not vaccinated, they are at risk of catching diseases that others are immune to. These people can also spread contagious diseases and put the entire community at risk.

The two sentences which support the overall argument with facts are:

- Statistics show that most vaccines are more than 90% effective in preventing diseases.

- However, when people are not vaccinated, they are at risk of catching diseases that others are immune to.

Explanation:

These two sentences (above) present factual information like statistics and what the risks are when getting vaccinated and therefore support the argument with facts.

The sentences in between these factual supporting sentences present additional information which help explain and elobarate on the factual information provided.

the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.