as a linear combination of 
and 
.
Q19: Compute the area of the projection onto
Q20: Consider the following two lines. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg"
Q21: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Let be
Q22: Find a scalar <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Find a
Q23: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Let .
Q25: For which values of h is the
Q26: Use cylindrical coordinates to describe the following
Q27: Consider the 3 lines. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Consider
Q28: Find the point of intersection <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg"
Q29: Three nonzero vectors, <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5596/.jpg" alt="Three nonzero