document.write( "Question 1054833: An exam consists of nine true-or-false questions. Assuming that every question is answered, in how many different ways can a student complete the exam? In how many ways may the exam be completed if a penalty is imposed for each incorrect answer, so that a student may leave some questions unanswered?
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document.write( "a. 129; 587
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document.write( "b. 637; 38,777
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document.write( "c. 587; 14,685
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document.write( "d. 146; 7,159
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document.write( "e. 512; 19,683
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document.write( "f. 161; 11,858\r
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document.write( "Thank you
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Algebra.Com's Answer #670047 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! 2 ways to answer each question, and 9 questions. That is 2^9=512, so E should be the answer. \n" ); document.write( "If some questions are unanswered, then it is 3^9, and that is 19,683. \n" ); document.write( "E. \n" ); document.write( " |