Based on the information provided in your question, it seems that there are signs of confusion in the units used to describe the time spent writing per problem.
However, I can derive the following interpretations:
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Maryna's Writing Rate: If Maryna spent 25 minutes per problem, this means she took longer to complete each problem than Sonia (if we assume Sonia's rate is less than 25 minutes). Therefore, we can determine that Maryna spent more time writing per problem than Sonia if Sonia's rate is indeed lower.
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Sonia's Writing Rate: If Sonia spent 20 minutes per problem, this means she was faster and spent less time per problem than Maryna.
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Comparison of Rates: Based on these presumed reading rates:
- Maryna spent more time per problem (25 minutes) compared to Sonia (20 minutes).
- Thus, the statement "Maryna spent less time writing per problem at the unit rate of 1 problem25 min" is incorrect because it contradicts the finding that Maryna actually took longer per problem than Sonia.
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Conclusion on Time Spent: If the rates mentioned are accurate, you can conclude:
- Maryna = 25 minutes/problem
- Sonia = 20 minutes/problem
- Hence, Sonia spent less time writing per problem compared to Maryna.
If you’re looking to choose from your listed responses, the best conclusion is:
Sonia spent less time writing per problem at the unit rate of 20 min/problem.
Please feel free to provide additional context or specific data tables if you want a more tailored interpretation!
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