Arandom sample of people is chosen to participate in a survey. for the survey results to be considered valid, which must be true of the random sample? the sample must be the same size as the population. the sample must represent the target population. the sample must be biased. the sample must be a group separate from the population.

(05.02) mr. morris is going to save money and replace his sailboat's mainsail himself. he must determine the area of the mainsail in order to buy the correct amount of material. calculate the area of the parallelogram to determine how much material should be purchased. be sure to explain how to decompose this shape into rectangles and triangles. describe their dimensions and show your work.