find the ratio of 8th and 4th term of sequence 3.1, 6.2, 12.4, .....? Choices:
A) 16
B) 12
C) 4
D) 8
E) 20
a= first term = 3.1   r = common ratio = 6.2/3.1= 
<gadget id="calculator">6.2/3.1</gadget>
<output>2</output>
2====&gt; 4th term = a * r^(4-1) = 3.1 * (2)^3 = 24.8 and 8th term = 3.1 * (2)^7 = 396.8   Ratio of a8/a4 = 396.8/24.8= 
<gadget id="calculator">396.8/24.8</gadget>
<output>16</output>
16 ------16ns- 16
<result>A</result>
find the ratio of 8th and 4th term of sequence 3.1, 6.2, 12.4, .....?