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How many codes are there that have 3 letters and 2 numbers?
There are 26 different letters.There are 10 different numbers.If a letter or number is allowed to repeat in the code:Number of ways to make 3 letters = 26 x 26 x 26 = 17,576Number of ways to make 2 numbers = 10 x 10 = 100Number of ways to make 3 letters and 2 numbers = 17,576 x 100 = 1,757,600Each group of 3 letters and 2 numbers can be arranged in (5 x 4 x 3 x 2) = 120 different ways.So the number of different codes = 1,757,600 x 120 = 210,912,000 .If a letter or number is not allowed to repeat in the code:Number of ways to make 3 letters = 26 x 25 x 24 = 15,600Number of ways to make 2 numbers = 10 x 9 = 90Number of ways to make 3 letters and 2 numbers = 15,600 x 90 = 1,404,000Each group of 3 letters and 2 numbers can be arranged in (5 x 4 x 3 x 2) = 120 different ways.So the number of different codes = 1,404,000 x 120 = 168,480,000 .
How to make three plus four equals seven using the numbers 0 - 9 for the letters?
9
Why did they make scientific notation?
To express extremely large numbers or extremely small numbers in an easier way. Sort of like saying cuz instead of because.
5 9 plus 22 plus y?
Sticking a query mark at the end of a bunch of numbers and letters does not make a sensible question that can be answered.
What is the scientific notation for water?
Scientific notation is a way of writing numbers that are too big or too small to be conveniently written in decimal form. The formula of water is H2O. The melting point is 32 degrees Fahrenheit. The density is 999.97 kg/m^3. There are very small numbers associated with water, but they usually come in small measurements to make the numbers more manageable.
