Step-by-step explanation:
For a geometric sequence,

1. The sequence is :
3, 13, 23, 33,...

It is not geometric. It is false
2. The sequence is :
5, -25, 125, -625

So, the sequence is geometric as the common ratio is same. It is true.
Answer:
The length will be multiplied by 2.
Step-by-step explanation:
By looking at the first and third ratio, we know that the no. of birck have been multiplied by 2 and the length has also been multiplied by 2 .
So when the number of bricks is multiplied by 2, the length is multiplied by 2
Answer:
Answer in photo
Step-by-step explanation:
#1. Answer will be D: 36cm^3
#2. Answer will be A: they have equal volumes.
Couldn't really help with the last one, apologies.
Hope this helped you so far.