Notice this is a geometric progression since each number multiplied by some factor equals the next number in the sequence, in this case,

Then by applying the formula for sum to infinity of a geometric progression,
4 and a half ducks.
That's pretty much the answer.
Answer:
Ox=26+7
Step-by-step explanation:
Whats the question ill be happy to help
4/6=0.6666666667
0.6666666667×39=26 millimeters