The numeral 20 is a constant, and never varies. The value of 20 changes when it is used in different mathematical bases, though.
The value of 20 (2-zero) is one thing in base 10, which we are all used to, and quite different in base 2 or base 16 (hexedecimal) for instance, which are used in computer function.
20 % of anyhthing (a constant/variable) is (20/100) times the /constant variable (in this case 20), this means 20 % of 20= (20/100) X 20 = (0.2) X 20 = 4
I think that you are thinking of a math constant. A constant is something that doesn't change. The opposite would be a variable, which can change. For example: y=5 In this case, y always equals 5; so y is a constant. Second example; y=2x In this example, y is a variable, because its value depends upon the value of x. For example, if x=2, then y=4, but if x=10, then y=20.
Macros are processed at preprocessing time where as constant variables are processed at complie time. Macros doesnot have any scope but constant variables has scope. Macros doesnot have the type checking where as constant variables have type checking.
The variable is k.
400 ÷ 20 = 20 hours (though it is unlikely that the speed would be constant!)
k is the variable.
It is 75 rounds, which would last you about 20 seconds constant fire, and would cost maybe $1.
Control SetupThe constant control set up is where you have every thing "normal" to use to compare your experimental set up with the variable to. This has no variables and is always constant. For example if you wanted to see if plants would grow faster watered with sugar water or plain tap water, your constant control set up would be the plant watered with plain water. Since this is the "normal" condition with no changes it is the control setup.Additionally there are two kinds of controls, positive and negative. Positive controls will have an indication or contain the specific substance that the test or instrument is used for. On the other hand, negative controls don't contain that specific substance or instrument. For example if you were testing the effects of aspirin on inflammation and you gave a group, 20 mgs of a placebo, that would be a negative control. Opposite to that would be a positive control, if you were testing the same thing and instead gave the group 20 mgs of the aspirin.Experimental SetupIn short the part of the experiment that contains the variable is called the experimental setup. This is identical to the control setup except in one way. One change is made to the set up, this change is called the variable. In the example of the plants watered with tap or sugar water, the experimental set up would be the plant watered in the sugar water. Since this is the setup an which you are testing this, it is called the experimental (think of the experimental setup as a test) setup.Experimental variableThe experimental variable is basically what you are changing between the control and experimental setups.In the example, your experimental variable would be what the plant is watered with. So in this case, it would be the sugar water.
You have to assign some variable name to "a number", for example, "n". The difference would be: 20 - n Half this difference is: (1/2) (20 - n) Or alternately: (20 - n) / 2
The time it takes to drive 20 miles depends on the speed at which you are driving. If you are driving at a constant speed of 40 miles per hour, it would take you 0.5 hours to drive 20 miles (20 miles / 40 miles per hour = 0.5 hours). If you are driving at a constant speed of 60 miles per hour, it would take you 0.33 hours to drive 20 miles (20 miles / 60 miles per hour = 0.33 hours).
Variable 5-20 meters
Variable 5-20 meters