Help with Dynamics Please -- Projectile fired downward into a fluid medium

[mally baringon]

Homework Statement

an someone tell me how to obtain the position step by step I keep getting integration and differentiating mixed up. I can do the first two parts its where it then goes to 2/0.8 im struggling HELP!

Relevant Equations

N/A

 

[berkeman]

Welcome to the PF.

Please show your work on the parts that you understand. That will help us a lot to understand what might be confusing you.

Also, please check out the LaTeX tutorial under INFO, Help at the top of the page. That will help you to post your work on problems like this. Thank you.