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Repeating decimals |
1999-11-22 |
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Andrew pose la question : Is 1.9 repeating the same as 2? Walter Whiteley lui répond. |
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Age in minutes |
1999-11-21 |
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Mesha Jackson pose la question : How old would I be in minutes if I were 12 Penny Nom lui répond. |
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A goofy clock |
1999-11-20 |
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Kate pose la question : While repairing a watch, a jeweler removed the hands and inadvertently replaced the hour hand on the min. spindle and vice versa. he set the hands to read 2:00pm, which was the correct local time when I picked up the watch. A few minutes later, I noticed that the hands were taking goofy positions. What was the first time thereafter that the watch would show the correct local time? Chris Fisher lui répond. |
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A matching quiz |
1999-11-20 |
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William J. Ricciardi pose la question : I gave a matching quiz the other day and one of my students got all 9 incorrect. That got me thinking......What is the probability that someone could get all 9 questions incorrect? Peny Nom lui répond. |
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Selecting some players |
1999-11-20 |
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Korbin Brown pose la question : Roger Craig, during his term as team manager of the San Francisco Giants, received a strange communication from the team general manager, Al Rosen. Mr. Rosen told him to select 25 players according to this formula: 1/2 of the team had to be outfielders and infielders 1/4 of the team had to be starting pitchers 1/6 of the team had to be relief pitchers 1/8 of the team had to be catchers Roger was a bit confused by Al's request, yet complied anyway. How did he do it? Claude Tardif lui répond. |
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Ratios and proportions |
1999-11-19 |
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Rebecca pose la question : I'm not that good of a student and I was woundering if there is a shortcut to ratios and proportion. My 6th grade teach tought all we needed to know. I was just wounder if there was an easier way. Claude Tardif and Harley Weston lui répond. |
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Area of a quadrilateral |
1999-11-19 |
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Zane Cram pose la question : I need the formula to calculate the area of an irregular sided rectangle. Each side has a different measurement or length. Walter Whiteley lui répond. |
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polynomial functions |
1999-11-19 |
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Quinn pose la question :
- Without fully factoring the following show that they all have the same zeros:
I: x4-x2+2x+6 II: -x4+x2-2x-6 III: -4x4+4x2-8x-24 IV: 10x4-10x2+20x+60 - When P(x)=x3-3x2+5x+1 and G(x)=x3-2x2-x+10 are each divided by(x-a) the remainders are equal. At what coordinate point does the graph of P(x) intersect G(x)?
Walter Whiteley lui répond. |
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la pantographie |
1999-11-18 |
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Erick et Christine pose la question : Nous recherchons la définition de pantographie voltaïque, que représente cette "figure" ? est-ce qu'on peut en définir une unité de mesure ? Claude Tardif lui répond. |
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Critical numbers |
1999-11-17 |
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Sarah pose la question : My question is this: If f(x)=2x3+4x2-9x+8 and the derivative is f'(x)=6x2+8x-9, how do I find the critical points if f'(x) is not factorable?? Penny Nom lui répond. |
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Percent |
1999-11-16 |
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Elaine Edwards pose la question : Can you please tell me what is 75% of $495.00? Penny Nom lui répond. |
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Two derivatives |
1999-11-16 |
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Gina Renicker pose la question : The derivative of: y=e(xlnx) and y=x2arctan(x1/2) Harley Weston lui répond. |
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The sixth game |
1999-11-16 |
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Stephanie Sprunger pose la question : Janice scored 18,21,27,16,and 19 points in five basketball games. How many points must she score in the next game to raise her average to 22 points per game? Penny Nom lui répond. |
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Domain and Range of a Function |
1999-11-14 |
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Michelle Mellott pose la question : How do you find the range of the following function: 2y2/(y2+5y+6)?? I know the domain is x not equalled to -2, -3. How can one easily find the range? Harley Weston lui répond. |
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Estimating the population mean |
1999-11-13 |
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John Barekman pose la question : Statitistics: Estimating the population mean when the standard deviation is known: I am not sure which n to use in the formula for the confidence interval equation: x +/- z*(standard deviation/sqrt(n)) If we have data of ten people, and if we have the data of ten sets of ten people each, what is the difference in the n that we use? What is the difference between the standard deviation and the standard error? Are we using the number of sampling means or just the number of samples? Harley Weston lui répond. |
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