Solve the problem.To get credit for graduation, Brittany completed 40 hours of community service. She worked at a soup kitchen for 
of the time. She picked up litter along highways for 
of the time. The rest of the hours she spent tutoring younger children after school. How much time did Brittany spend tutoring?
A. 21
hours
B. 19
hours
C. 19
hours
D. 20
hours
Answer: B
Mathematics
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A. 
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C. 3? + 
D. 
+ 
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B. domain: (-?, ?); range: (0, ?)
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