题目内容：

operation management 需要过程（急）,
You’ve just completed a pilot run of 10 units of a major product and found the processing time
for each unit was as follows:
UNIT NUMBER TIME (HOURS)
1 970
2 640
3 420
4 380
5 320
6 250
7 220
8 207
9 190
10 190
a.According to the pilot run,what would you estimate the learning rate to be?
b.Based on a,how much time would it take for the next 190 units,assuming no loss of learning?
c.How much time would it take to make the 1,000th unit?