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Construct Arguments- A human usually has 20 baby teeth, which are replaced by 32 adult teeth. Raul lost 8 of his baby teeth. Raul said he lost 4/10 of his baby teeth. Ana said Raul lost 2/5 of his baby teeth. Which of these conjectures are true? Construct an argument to justify your answer.

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Answer:

Explanation:

Ana's conjecture that Raul lost 2/5 of his baby teeth is true.

To see why, consider that Raul originally had 20 baby teeth. If he lost 8 of these teeth, that means he has 20 - 8 = 12 baby teeth remaining. To determine what fraction of his baby teeth he lost, we can calculate:

8 baby teeth lost / 20 baby teeth total = 2/5

So, Raul lost 2/5 of his baby teeth, which supports Ana's conjecture.

On the other hand, Raul's statement that he lost 4/10 of his baby teeth is not correct, since 4/10 can be simplified to 2/5, which is the same as Ana's conjecture that he lost 2/5 of his baby teeth.

User Robert Ravikumar
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