Answer:
is the correct answer to the given question .
Step-by-step explanation:
Equivalent expression are the same expressions although they can appear tiny bit differently.In the given question we have to express 10 + 10 + 10 in the multiplication form
Therefore

i. e=30
Which is same as

=30
so
3 * 10 is the correct answer
The sample size, n required to produce a margin of error, M, in a probability proportion distribution is given by:

The above formular shows that the sample size is inversely proportional to the Margin of error.
Then we have:

where k is some constant.
Now suppose we decrease M by a factor of 3,


Therefore, if we decrease the Margin of error by a factor of 3, we need to increase the sample size by a factor of 9.
160 divided by 2 is 80, 80 divided by 2 is 40, 40 divided by 2 is 20, 20 divided by 2 is 10
the next two in line are 20 and 10
The answer is 6 x 3 x 3 = 54.
I found this by finding the surface area with 9 x 6 and then seeing that 6 x 3 x 3 gives the same answer knew that one was correct, but I'm sure there's an easier way, good luck.