Answer: 0.69 m/ mile.
Explanation:
The altitude gradient between two cities X and Y = 
Given: Two cities are separated by 200 miles.
City X has an altitude of 122 meters.
City Y has an altitude of 260 meters.
The altitude gradient between two cities X and Y =

Hence, the altitude gradient between the two cites = 0.69 m/ mile.
The part of an atom that is mostly empty space is the electron cloud
Answer:
A statement can contain one argument, more than one argument or no argument.
Argument are intended to determine the degree of truth hence enabling a conclusion to be made. It contains one or more premises and only one conclusion.
A premise is the statement in the argument that provides reasons to support a conclusion.
In the first statement, there is no argument. This is because there is neither a premise nor a conclusion
The second statement has a conclusion(the last sentence) and two premises(first two sentences) therefore it is an argument.
Yes they contain a permanent vacuole
It is about 78%, I hope that this helped :)