Ok so 38 is half of 76 and 19 is half of 38. If you follow this pattern then theoretically you should get 9.5
Answer:
I think 20 is the answer of the question
6 times 79 = 474 so the 79th term is 474
15 times 2 = 30
20 times 2 = 40
40 + 30 = 60
60 / 6 = 10
so the answer will be 10
Translation of a line segment doesn't affect it's length, 'cause it has shifted from one location to another, no change in it's size.
In short, Your Answer would be Option B
Hope this helps!