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D Question 37 10 pts An activity's normal time and cost are 10 and $120, respectively. Its estimated crash time and cost are 7 and $180, respectively. What is this activity's crash cost per time unit? O $20 O $30 O $40 O $50 O $60 Question 38 10 pts The relationship between the normal point and the crash point is assumed to be O variable. O exponentially related. O curvilinear. O linear. O conversely related