2(4)+2(6)=20cm^2 because opposite sites in a parallelogram are always the same length
For this case we have that initially the bottle contains
of liter of water.
If a person drinks
of the contents of the bottle we have:

Thus, the person drinks
liters of water.
Answer:
The person drinks
liters of water.
Answer:
B. A pair of intersecting lines
Step-by-step explanation:
The attached image can give you an idea of what you get when a plane perpendicular to the base of a cone intersects the vertex of the cone.
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In the problem statement here, we assume a double-napped cone with no defined base. That means the lines of intersection with the sides of the cone will meet at the vertex point and extend indefinitely in either direction.
The intersection is a pair of intersecting lines.
Using the Pythagorean theorem:
c = sqrt(8^2 + 7^2)
c = sqrt(64 + 49)
c = sqrt(113)
c = 10.6