document.write( "Question 692369: a history teacher gives a 20 question true false exam. in how many ways can the test be answered if the possible answers are true or false or possible to leave the answer blank \n" ); document.write( "
Algebra.Com's Answer #426979 by Alan3354(69443)\"\" \"About 
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a history teacher gives a 20 question true false exam. in how many ways can the test be answered if the possible answers are true or false or possible to leave the answer blank
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\n" ); document.write( "3^20
\n" ); document.write( "= 3,486,784,401 ways
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