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NCSU MA 242 - Symbolic Answers (Part B)

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5/10/12 9:42 PMSymbolic Answers (Part B)Page 1 of 5http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=3769803Current Score : 4 / 4 Due : Wednesday, February 1 2012 11:02 PM EST1. 0.5/0.5 points | Previous AnswersEnter the following expression using the Math Pad and/or any keyboard shortcuts you like. 2. 0.5/0.5 points | Previous AnswersEnter the following expression using the Math Pad and/or any keyboard shortcuts you like. 3. 0.5/0.5 points | Previous AnswersEnter the following expression using the Math Pad and/or any keyboard shortcuts you like. 4. 0.5/0.5 points | Previous AnswersSymbolic Answers (Part B) (Homework)Ali Al ZaabiMA 242, section 001, Spring 2012Instructor: J. Louis CappsWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made.5/10/12 9:42 PMSymbolic Answers (Part B)Page 2 of 5http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=3769803Now we will try entering square roots. There is obviously no square root key on your keyboard, so thePad comes in very handy here!Enter the expression below by:1) clicking in the answer box so that the Pad appears2) click the button on the Pad that looks like a square root with a box under it3) type the 5Try it now! = Alternately, even though there is not a square root button on your keyboard, there is a keyboardshortcut for square roots! To use the keyboard shortcut:1) click the answer box so that the Pad appears2) type sqrt( , that is, type the letters sqrt followed immediately by the "open parenthesis", (3) type the 5Try it now! = 5. 0.5/0.5 points | Previous AnswersIf you need to enter a cube root (or any radical other than a square root) then the Pad must be used.There is a special button for this. Enter the expression below by:1) clicking in the answer box so that the Pad appears2) clicking the "Functions" button on the Pad to open the Functions sub-menu3) clicking the button that looks like a square root, but with an extra little box4) type the 35) click the little box under the radical6) type the 10xTry it now!5/10/12 9:42 PMSymbolic Answers (Part B)Page 3 of 5http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=3769803 = 6. 0.5/0.5 points | Previous AnswersEnter the following expression using the Math Pad and/or any keyboard shortcuts you like.Hint: There are multiple ways to enter this answer, but you might find the following steps easy toremember:1) click in the answer box to make the Pad appear2) type the x - 23) use your mouse to highlight the x - 24) click the fraction button on the Pad5) type the x + 56) use your mouse to highlight everything you have typed so far7) click the button on the pad that lets you add the "little number" (which is called an exponent if youhave forgotten from previous math classes!)8) type the 4 7. 0.5/0.5 points | Previous AnswersEnter the following expression using the Math Pad and/or any keyboard shortcuts you like.5/10/12 9:42 PMSymbolic Answers (Part B)Page 4 of 5http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=3769803 8. 0.5/0.5 points | Previous AnswersThis is important! Symbolic questions using Math Pad generally require a higher degree of accuracy thannumerical questions. For this reason it is better to type the expression in an "exact" form rather than touse decimal approximations.For example, let's assume that you have worked a problem and you have found that the answer isYou might be tempted to just change that 1/3 to a decimal such as 0.33 and give the answer 0.33xHowever, because the answer is symbolic it is not going to grade that as a correct answer because 1/3is exact and 0.33 is simply an approximation that it does not consider to be "close enough" to be gradedas correct.If, however, your final answer wasthen it would be perfectly acceptable to enter 0.5x. This is because 1/2 and 0.5 are EXACTLY the samething (no rounding has been done).That said, if you MUST round a number for some reason always give that number to 6 or 7 decimalplaces (if possible) so that you can make the approximation "close enough" to be graded as correct. Enter the expression below without rounding.5/10/12 9:42 PMSymbolic Answers (Part B)Page 5 of


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NCSU MA 242 - Symbolic Answers (Part B)

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