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Repeating decimals |
1999-11-22 |
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From Andrew:
Is 1.9 repeating the same as 2?
Answered by Walter Whiteley. |
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Age in minutes |
1999-11-21 |
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From Mesha Jackson:
How old would I be in minutes if I were 12
Answered by Penny Nom. |
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A goofy clock |
1999-11-20 |
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From Kate:
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?
Answered by Chris Fisher. |
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A matching quiz |
1999-11-20 |
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From William J. Ricciardi:
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?
Answered by Peny Nom. |
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Selecting some players |
1999-11-20 |
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From Korbin Brown:
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?
Answered by Claude Tardif. |
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Ratios and proportions |
1999-11-19 |
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From Rebecca:
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.
Answered by Claude Tardif and Harley Weston. |
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Area of a quadrilateral |
1999-11-19 |
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From Zane Cram:
I need the formula to calculate the area of an irregular sided rectangle. Each side has a different measurement or length.
Answered by Walter Whiteley. |
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polynomial functions |
1999-11-19 |
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From Quinn:
- 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)?
Answered by Walter Whiteley. |
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la pantographie |
1999-11-18 |
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From Erick et Christine:
Nous recherchons la définition de pantographie voltaïque, que représente cette "figure" ? est-ce qu'on peut en définir une unité de mesure ?
Answered by Claude Tardif. |
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Critical numbers |
1999-11-17 |
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From Sarah:
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??
Answered by Penny Nom. |
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Percent |
1999-11-16 |
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From Elaine Edwards:
Can you please tell me what is 75% of $495.00?
Answered by Penny Nom. |
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Two derivatives |
1999-11-16 |
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From Gina Renicker:
The derivative of: y=e(xlnx) and y=x2arctan(x1/2)
Answered by Harley Weston. |
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The sixth game |
1999-11-16 |
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From Stephanie Sprunger:
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?
Answered by Penny Nom. |
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Domain and Range of a Function |
1999-11-14 |
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From Michelle Mellott:
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?
Answered by Harley Weston. |
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Estimating the population mean |
1999-11-13 |
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From John Barekman:
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?
Answered by Harley Weston. |
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