An arithmetic sequence is represented by the explicit formula a(n) = 2 + 9(n - 1). what is the recursive formula? . a. a(n) = a(n - 1) + 2. b. a(n) = a(n - 1) + 9. c. a(n) = a(n - 1) - 9. d. a(n) = a(n - 1) - 3

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet