supermanaccz

If I am guessing correct, the density is the amount of liters divided by the volume. 

So the volume is $7\cdot{4}\cdot{10} = 280$

The density $10690.4\div{280}=\boxed{38.18}$

The first step is to find out how much fabric she has.

We can convert to decimal.

3 1/4 = 3.25

1 1/2 = 1.5

3.25 + 1.5 = 4.75

5 1/2 = 5.5

5.5 - 4.75 = 0.75

She still needs 3/4 yards of fabric. 

I hope this helped.

Considering the base $b$ representation of this number, it equals $6\cdot b^2 + 6 \cdot b + 3 = 3(2 \cdot b^2 + 2 \cdot b + 1)$. So for any choice of base $b,$ we see that $663_b$ is divisible by 3. Therefore there is no $b$ for which $663_b$ prime.

Oh yay! My LaTeX finally worked for once. 

The definition of a rational number is any number that can be expressed as the quotient or fraction p/q of two integers.

For example, 1/7 = 0.142857142857...

This keeps going, it never ends but it is still rational. 

π, on the other hand is irrational because there is no pattern: 3.14159265358979323846...

Your number, as it appears has no pattern so it must be irrational.

All you need to do in this problem is plug in the numbers you know into the given function. 

2, 4, 16, 64, and you keep going...

Do you want the simplified version or the decimal?

Since this is an exponential growth, I probably means the number of people who started the challenge, B.

This is because as it is growing, the is exponentially growing of the the beginning variable, or the number of people in the beginning. 

Sorry it's a bad explanation but I'm pretty sure the answer is B. 

Do you guys understand my response?

I think I can give it a try!