 |
|
|
|
|
|
|
|
|
Two problems |
2001-03-23 |
|
From James:
Casey is a finanical consultant for ABC finance. She earns $456.21 weekly. Her annual group medical coverage costs $1942, of which ABC pays 65%. How much is deducted weekly for medical coverage? and: Eleanor demonstrates microwaves at the national home show. She is paid $7 for each of the first 7 demonstrations and $11 for each demonstration after 7. What is her commission for a day if she makes 12 demonstrations?
Answered by Penny Nom. |
|
|
|
|
|
|
A famous landmark |
2001-03-23 |
|
From Corinne:
A family is traveling due west on a road that passes a famous landmark. At a given time the bearing to the landmark is N 62 degrees W, and after the family travels 5 miles farther the bearing is N 38 degrees W. What is the closest the family will come to the landmark while on the road?
Answered by Harley Weston. |
|
|
|
|
|
|
Genealogy |
2001-03-22 |
|
From Brian:
In considering tracing genealogy the problem of a large and growing number of direct (grandparent) ancestors arose. Since the number of grandparents in any given generation doubles, for a person born in 2000 and assuming 25 year generations, in the year 1000 that person would have over one trillion direct ancestors in that year alone. Since estimates I have read place the total world population in 1000 at 250-300 million, the one trillion figure cannot be correct. I must be missing something in my calculations. Can you help provide the answer? While I am unlikely to be able to trace back to 1000, there is reason to believe 1250 is possible. Even in that year there would exist over one billion direct ancestors. That is certainly rather daunting and unlikely to be achieved if correct.
Answered by Penny Nom. |
|
|
|
|
|
|
Camille Jordan |
2001-03-22 |
|
From Missy:
PLEASE SEND ME INFORMATION ON CAMILLE JORDAN AND HIS WORK IN ABSTRACT ALGEBRA
Answered by Rick Seaman. |
|
|
|
|
|
|
Factoring |
2001-03-22 |
|
From Kaleena:
Factor this equation: 5x7-10x5+4x3-8x
Answered by Harley Weston. |
|
|
|
|
|
|
Why exactly can't you divide fractions? |
2001-03-22 |
|
From Dennis:
Why exactly can't you divide fractions?
Answered by Penny Nom. |
|
|
|
|
|
|
The repetend in repeating decimals |
2001-03-21 |
|
From Sharon:
What is the name for the bar over the repetend in repeating decimals? Also, what is the name of the long division "house"?
Answered by Penny Nom. |
|
|
|
|
|
|
A bargin with the devil |
2001-03-21 |
|
From DJ:
There once was a boy who spent all his time dreaming about getting rich. " I would do anything to be rich". The devil, hearing this, appeared before the boy and offered to make him rich. "See that bridge?" said the devil. Just walk across and I will double your money you have now. In fact, each time you cross I will double your money. There is just one thing you must give me $24 after each crossing. The boy agreed. He crossed the bridge, stopped to count his money and, and sure enough, it had doubled. He paid the devil $24 and crossed again. Again his money doubled. He paid another $24 and crossed a third time. Again his money had doubled, but this time there was only $24 left which he had to pay the devil so he was left with nothing. The devil laughed and vanished. - How much money did the boy start with?
Answered by Penny Nom. |
|
|
|
|
|
|
Timing with hour glasses |
2001-03-20 |
|
From Nathan:
How can a chef use an 11 minute hour glass and a seven minute hour glass to time a vegtable that needs to be steamed for 15 minutes.
Answered by Leeanne Boehm. |
|
|
|
|
|
|
Radicals |
2001-03-18 |
|
From Nikki:
3) squareroot of x2 + 10x + 25 4) sixthroot of (m + 4)6 5) cuberoot of -64r6w15 .
.
.
.
Answered by Penny Nom. |
|
|
|
|
|
|
Le volume d'un ellipsoïde |
2001-03-17 |
|
From Lise:
Je cherche à calculer le volume d'un ovoide, avez-vous une formule?
Answered by Claude Tardif. |
|
|
|
|
|
|
Recherhce sur pi et exponentielle |
2001-03-17 |
|
From Cyril:
étudiant a la fac de sciences de montpellier je cherche des informations concernant la demonstration suivante: "comment prouver que pi et exponentielle sont irrationnels?"
Answered by Claude Tardif. |
|
|
|
|
|
|
Systems of equations |
2001-03-16 |
|
From joy:
How do u solve problems using systems of equations?
~ finding x and y~ ex:
26 = 3x - 2y
42 = 4x + y
Answered by Penny Nom. |
|
|
|
|
|
|
How can you prove a quadrilateral to be a parallelogram? |
2001-03-16 |
|
From Joy:
How can you prove a quadrilateral to be a parallelogram?
Answered by Walter Whiteley. |
|
|
|
|
|
|
Zero |
2001-03-15 |
|
From Alexandre:
j'aimerais beaucoup savoir si le chiffre zéro est considéré comme étant soit: - pair
- impair
- pair et impair à la fois
- ni pair ni impair.
Answered by Claude Tardif. |
|
|
