6 minutes.
4/5 of an hour is 48 minutes, and there are 8 math problems, and 48, the time left, divided by 8, the number of problems, will get you 6 minutes to spend on each problem.
Answer:
6 minutes
Explanation:
4/5 hours = 4/5*60=48 minutes. 48 minutes divided by 8 math problems = 6 minutes per problem.
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