It is given in the question that B is in between C and D.
Therefore

Substituting the given values of CB,BD and CD, we will get

Combining like terms, we will get

Now we need to move 4 to the right side by adding 4 to both sides, that is

could you maybe ask this again and provide an image of some sort or some more context? im not sure
Assuming you meant 1/3, 28 bags should be it
Answer:
0.125 or about 0.13
Step-by-step explanation:
Length times width times height.
A negative sign under a square root means that the root is a not a real number.
A negative sign outside a square root means we can "cover it" and evaluate the square root.
When the sign is outside, you can do the root first, then apply the sign. Not so if the sign is inside.
Thus, √-49 is not real and -√64 = -8.