In terms of Ben's time in the big meet, what is his marginal productivity of the number of yards he practices? The marginal product of increasing practice yards from 50,000 to 60,000 is second(s) (enter a numeric response using a real number rounded to one decimal place), and the marginal product of increasing practice yards from 60,000 to 70,000 is second(s). Is there diminishing marginal productivity of practice yards? In terms of Ben's place in the big meet, what is his marginal productivity of the number of yards he practices? The marginal product of increasing practice yards from 50,000 to 60,000 is place(s), and the marginal product of increasing practice yards from 60,000 to 70,000 is place(s). Is there diminishing marginal productivity of practice yards? Does Ben's marginal productivity of the number of yards he practices depend on how he measures his productivity, either place or time, in the big meet? Ben swims 50,000 yards per week in his practices. Given this amount of training, he will swim the 100yard butterfly in 59.7 seconds and place 10th in a big upcoming meet. Ben's coach calculates that if Ben increases his practice to 60,000 yards per week, his time will decrease to 55.2 seconds and he will place 8th in the meet. If Ben practices 70,000 yards per week, his time will be 53.6 seconds and he will win the meet