Hey all, so I don't really have anyone to turn to for this short problem set, and when I did them, I got answers that were too big. I would really appreciate any help, so thanks in advance!

River currents (miles per hour) at a certain location are given below. The current direction at this location was “from the north” during the time interval shown, and the current did not exhibit any severe fluctuations other than those shown in the chart.

Time (AM) | 6:00 | 6:10 | 6:20 | 6:30 | 6:40|
-----------------|-------------------
Speed (mph) | 17...| 20.....| 22....| 21....| 17

Question

Hey all, so I don't really have anyone to turn to for this short problem set, and when I did them, I got answers that were too big. I would really appreciate any help, so thanks in advance!

River currents (miles per hour) at a certain location are given below. The current direction at this location was “from the north” during the time interval shown, and the current did not exhibit any severe fluctuations other than those shown in the chart.

Time (AM)     | 6:00 | 6:10 | 6:20 | 6:30 | 6:40|
-----------------|-------------------
Speed (mph) | 17...| 20.....| 22....| 21....| 17

anonymous · Answer

A.	Using trapezoids, estimate the average river current speed from the north from 6:00 AM until 6:40 AM. 

B.	At approximately what time between 6:00 AM and 6:40 AM would you estimate that the river current had the average velocity? 

C.	A message in a bottle near this location is released at 6:00 AM. Assuming that the bottle travels along with the river’s current, approximately how far south will the bottle be at 6:40 AM? 

D.	What is the average acceleration of this bottle from 6:00 AM to 6:40 AM? 

As I said, any help is appreciated. Thanks!!!

anonymous · Answer

I've actually figured out A

anonymous · Answer

Yea I still can't figure out where to go on B. Does it have to do with my limits of integration?