Answer:
These numbers are the Powers of Two
Beginning with term #1 = 2, the next term is always 2 times the PRECEDING term.
Second term is two squared, or 2 times 2, namely four.
Third term, multiply that four by two, giving eight, also known as two cubed.
Fourth term is twice as much, namely sixteen.
Just keep on doubling!
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
20 divided by 4 is 5
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Answer: 
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3*sqrt(7)
3 times the square root of 7
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Explanation:
I'm assuming the V stands for square root. You can write sqrt(63).

The idea is to factor 63 in such a way that one factor is the largest perfect square possible, that way we can pull the root apart to simplify as shown above. The rule I used for the second step is 

There are three parts to this figure: a rectangle and two triangles that are congruent.
We'll add together the area for each to get the total area.
We'll start by finding the area of the rectangle. We don't know its length, so we need to find the bases of the triangles and add them together.
We know that
. Substitute and solve for
:

Now, double this to get the total length of the rectangle, which is
inches.
The area of the rectangle is equal to its length times its height:

Now, we'll find the area of one of the triangles and double it since they're congruent.
The area of a triangle is one-half of its base times its height, which we then double.

The
and the
cancel each other out.

Substitute and solve:

Finally, add the rectangle's area to the two triangles' area.
