The common ratio of the geometric sequence is 0.1, the correct option is C.
What is a Geometric sequence ?
A series of numbers such that the consecutive term is increasing or decreasing by a common ratio is called a geometric series.
The standard equation for geometric series is
Tₙ = a₁ rⁿ⁻¹
The series is
70, 7, 0.7, 00.7, 0.007, .....
The common ratio is the ratio of the second term to the first term, or nth term to (n-1)th term
r = 7/70
r = 1/10
r = 0.1
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