Regina spent 3 over 4, of an hour on her Math homework on Tuesday night. That evening, she also completed Spanish, History, and Biology homework. She spent twice as much time on her History homework as she did on her Math homework, 1 over 2, of an hour on Spanish homework, and 5 over 8, of an hour on Biology homework. How many hours did Regina spend on her homework in all? Express the answer as a decimal.
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