Sequence:

1, 0.2, 0.04, 0.008, ...

Formula:

Solution:

Observe that:

• 1 × 1/5 = 0.2
• 0.2 × 1/5 = 0.04
• 0.04 × 1/5 = 0.008

Hence, this geometric sequence has a common ratio of 1/5

Plugging in to our formula,

Hence, we select Option C.

Answer:

C. 1.25