The answer is D, 30cm.
If you do 6+6+9+9 (to find the perimeter) you get your answer.
√20 = 4.47213
√20 = 4 (nearest integer)
√20 = 4.5 (nearest tenth)
<u>ANSWER</u>
The common ratio is -3.
<u>EXPLANATION</u>
In general, the common ratio of a Geometric Sequence is given by:

We can find the common ratio using any two consecutive terms of the geometric sequence by dividing the subsequent term by the previous term.
The given sequence is -2,6,-18,54
Using the first two terms the common ratio is

We could also used the second and third terms to get

and so on and so forth.
Therefore the common ratio is -3.
Answer:
45
Step-by-step explanation:
5/6 of 54 is 45
2m=x
2for tables washed
For minutes
X for total tables washed