Answer:
d. 1/4
Step-by-step explanation:
The common ratio will be the ratio of any two adjacent terms:
(3/12)/(3/3) = (1/4)/1 = 1/4
d
If the sequence is geometric then a common ratio r will exist between consecutive terms.
÷ 1 = =
÷ =
A common ratio of r =
Hence sequence is geometric
-20
multiply 5 and 6 then 5 and -10
30-50=-20
D: 50 Square Units