Solving ODE application problems

[srk999]

I attached scans of the questions rather that typing it all here. It's also easier to read.

Questions:
http://img4.imageshack.us/img4/9306/33991727.th.jpg

Attached Reference Materials:
http://img40.imageshack.us/img40/6599/74821170.th.jpg

 

[HallsofIvy]

What are you doing? Just posting your homework in the hopes that someone will do it for you? How are you going to handle tests?