(Answered) A community college pays part-time teachers 60 per hour if

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A community college pays part-time teachers $60 per hour if they meet minimum qualifications to teach a course, $70 per hour if they hold a master's degree, and $80 per hour if they hold a doctorate. If this college has 6 part-time teachers who only meet minimum requirements, 18 with master's degrees, and 4 with doctorates, what is the average hourly pay rate?

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