0
Let the digit be x x x x
The first space can be filled in 9 ways as 0 is excluded. The second space can be filled in 9 ways as 0 is included. The third in 8 ways and the fourth in 7 ways.
Total number of permutations (assuming all of the digits are different) is 9 x 9 x 8 x 7 = 4,536.
If you assume the digits can repeat, the number of permutations become 9 x 10 x 10 x 10 = 9,000.
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How many 4 number combinations are there in 4 numbers?
-- 4 numbers can be lined up in 24 different ways-- If the order doesn't matter, then there's only one4-number combination of 4 numbers.
What is the average of 36 59 62 21?
To find the average, we add all the numbers together and divide by the amount of numbers 36+59+62+21=178 4 numbers were added up so we divide by 4 178/4=44.5 So the average is 44.5
Is the square root of -4 irrational?
The square root of -4 is not irrational, it is imaginary. Irrational numbers are numbers that cannot be expressed as a fraction, like the square root of 2. Irrational numbers, however, are a subset of real numbers. The square root of -4 however, is not even a real number because no real number, when squared, gives -4. Therefore the square root of -4 is an imaginary number.In calculus, the root is expressed as 2i where iis the square root of -1.
What is the Domain and Range of y equals the square root of x minus 4?
In the complex field, the domain and range are both the whole of the complex field.If restricted to real numbers, the domain is x >= 4 and y can be all real numbers >= 0 or all real numbers <= 0 [or some zigzagging pattern of that set].
Write numbers in fractional form 4.5?
write 4.5 in fractional form
