Find the surface area of the pyramid

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Are the corresponding angles congruent? explain why or why not.