The lines l and m have equations r = 3i – 2j + k + t(-i + 2j + k) and r = 4i + 4 + 2k + u(ai + bj – k) respectively, where a and b are constants. Given that I and m intersect, show that, 2a – b = 4

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