document.write( "Question 155471: Do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case.
\n" ); document.write( "I would appreciate a detailed answer. \n" ); document.write( "
Algebra.Com's Answer #114490 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
A password consists of 11 characters. A user must select a password consisting of AT LEAST 2 lower case letters, 2 upper case letters, 2 digits AND 2 special characters. How many passwords exist?
\n" ); document.write( "#lower case letters = 26
\n" ); document.write( "#upper case letters = 26
\n" ); document.write( "#digits = 10
\n" ); document.write( "#special characters = 32
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\n" ); document.write( "Comment: I'm assuming repetition is not allowed.
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\n" ); document.write( "Pick 2 lower case: 26C2 leaving 24
\n" ); document.write( "Pick 2 upper case: 26C2 leaving 24
\n" ); document.write( "Pick 2 digits: 10C2 leaving 8
\n" ); document.write( "Pick 2 special characters: 32C2 leaving 30\r
\n" ); document.write( "\n" ); document.write( "Pick 3 of anything without repeating previous selections 86C3
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\n" ); document.write( "Multiply all those picks, then multiply by 11! to get all the arrangements.
\n" ); document.write( "I get 9.410585 x 10^16
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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