Answer:
4 kilometers.
Step-by-step explanation:
Did I understand correctly, the first number is:

?
in other words, this would be:

and if you drink half of it, then we divide this number by 2:

because 30/2=15
so you would have

still more than a daily dose!
We can change the law of sines a little bit to match our problem.

We know what angle Y is and what side y is, so let's use that along with angle Z and side z:

Plug in what we know:

Multiply 'z' to both sides:

Divide sin(51)/2.6 to both sides:

Plug it into your calculator.
It is a prime factorization because each base (2,3,5, and 11) is a prime number.
A prime number is one where the only factors of it are 1 and itself.
- factors of 2 = 1 and 2
- factors of 3 = 1 and 3
- factors of 5 = 1 and 5
- factors of 11 = 1 and 11
Instead of saying something like 11^2, we could write 11*11. Similarly, 5^4 could be written as 5*5*5*5. Though it's a good idea to use exponents so you make the prime factorization more compact and save time.
The '3' without an exponent is the same as 3^1. You'll often see that exponent of 1 left out. Again this is to save time.
...........The answer is C