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Firm A operates 10 hours each day, producing 100 parts/hour. If productivity were increased 5%, how many hours would the plant have to work to produce 1000 parts? A. less than 2 hours B. between 6 and 8 hours C. between 9 and 10 hours D. between 2 and 6 hours E. between 8 and 9 hours Firm A operates 10 hours each day, producing 100 parts/hour. If productivity were increased 40%, how many hours would the plant have to work to produce 1200 parts? A. less than 2 hours B. between 2 and 6 hours C. between 9 and 10 hours D. between 8 and 9 hours E. between 6 and 8 hours Firm A operates 8 hours each day, producing 80 parts/hour. If productivity were increased 30%, how many hours would the plant have to work to produce 800 parts? A. between 9 and 10 hours B. between 8 and 9 hours C. between 2 and 6 hours D. between 6 and 8 hours E. less than 2 hours