where 
is the path 
from 
to 
and 
.
Q20: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Let .
Q21: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Let be
Q22: Find the surface area of the surface
Q23: Compute the work performed in moving a
Q24: Compute the surface integral <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Compute
Q26: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Let denote
Q27: Compute the line integral <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Compute
Q28: Find a potential function for the field
Q29: Compute <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Compute ,
Q30: Find <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Find where