Step-by-step explanation:
ps||pr are parallel
pQR=Rsp
In general, there is no reason to believe they are parallel.
If the figure is described as a square, rectangle, rhombus, parallelogram, trapezoid, or any other quadrilateral with parallel sides, then they probably are. (Except AB and CD may be parallel in the trapezoid, so the answer there is "maybe.")
Mr Chan spent

dollars when he bought the shares. If he sells 45 shares at 3.80, he will gain

dollars. So, the net profit would be
