I think 12 might be the second one, I'm not sure though!
Answer:
0.09
Step-by-step explanation:
Answer:
Surface Area = 82.8 square meters
Volume = 37.96 cubic meters
Surface area:
6 × 2 = 12
9 × 2 = 18
8.8 × 6 = 52.8
12 + 18 + 52.8 = 82.8
Volume:
6 × 2 × 9.49 = 113.88
113.88 ÷ 37.96
First, we inspect what type of sequence is the order of the coordinates:
a2 = 1
a3 = 2
a4 = 4
Getting the difference,
a3 - a2 = 1
a4 - a3 = 2
The differences are not equal; hence, the sequence is not arithmetic.
Getting the ratio:
a3/a2 = 2
a4/a3 = 2
The common ratio is 2. Using the general form for a geometric series:
an = a1 r^(n-1)
If n = 2
1 = a1 (2)^(2-1)
a1 = 1/2
So,
an = (1/2) (2)^(n-1)
The answer is the first option.
