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Diamonds and Pearls |
2003-12-11 |
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From Lauren:
A crown holds a total of 3080 jewels.
It is made up of diamonds and pearls.
There are 10 times as many diamonds as there are pearls.
How many pearls are there?
Answered by Penny Nom. |
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1/0 = ?? |
2003-12-09 |
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From Lisa:
One of my students asked me a fractions question. She knows that 0/1
equals 0 but does 1/0 also equal 0?
Answered by Walter Whiteley and Penny Nom. |
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Non-euclidean geometry |
2003-12-08 |
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From Geoffrey:
How can you use non-euclidean geometry to navigate on a sphere? What geometers did work in this area?
Answered by Chris Fisher. |
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Matrices |
2003-12-05 |
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From Julie:
I am doing a project and need to find some mathematiciens who had an influence in matrices. I can't seem to find any when I search online. Could you please help me with this?
Answered by Judi McDonald. |
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Prescription drug coverage |
2003-12-04 |
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From Khadijah:
Last week congressional approval was given to legislation involving prescription drug coverage for seniors. One summary of the legislation explains that it is estimated that in 2006 a senior will pay a premium of $35 per month, then pay their first $250 in pharmacy bills. After the bills reach $250, the coverage would pick up 75% of their bills that bring their total bills between the $250 and $2250 mark. After their bills reached a total of $2250, the senior would be responsible for all bills bringing their total annual bills between $2250 to $5100. Then any bills after the $5100 mark has been reached will be 95% covered by the insurance. Using this information, letís analyze the situation of a senior who accumulates $6000 in pharmacy bills over one year and has the insurance coverage. Over the course of this year, how many dollars will the senior pay?
Answered by Penny Nom. |
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What percentage of 6 billion is 40 million? |
2003-12-03 |
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From GiGi:
What percentage of 6 billion is 40 million?
Answered by Penny Nom. |
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The median |
2003-12-03 |
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From Christiane:
how do you find the median of this group of numbers:63,75,29,37,49?
Answered by Penny Nom. |
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Non-Euclidean geometry |
2003-12-03 |
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From Geoffrey:
What are the applications of Non-Euclidean geometry (especially hyperbolic and spherical)?
Answered by Walter Whiteley. |
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Four digit combinations |
2003-12-02 |
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From Deen:
Question:
i have 3 numbers and i have to come up with all the possible 4-digit combinations with those 3 numbers. Is there a formula for it?
Example:
given numbers are 1-2-9 and you need to break a 4 digit code. what are the posiible combinations that u can come up using the 3 numbers?
Answered by Penny Nom. |
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A locus |
2003-12-02 |
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From Tash:
Question:
a)Find the equation of the locus of the point P which moves so that its distance from A(1,2) is always three times its distance from B(5,6)
b) Show that this locus is a circle and states the coordinates of its centre and the length of its radius
Answered by Penny Nom. |
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Finding angles |
2003-12-02 |
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From Jason:
I AM TRYING TO SOLVE A TRIG PROBLEM AND HAVE
FORGOT HOW TO DO IT. WHAT I HAVE IS A RIGHT TRIANGLE WITH SIDE A BEING 14
FEET AND SIDE B BEING 3 FEET, USING PYTHAGOREAMS THEOREM SIDE C SHOULD
EQUAL 14.318 FEET ON A RIGHT TRIANGLE BUT I AM TRYING TO REMEMBER HOW TO
FIND MY ANGLES OTHER THAN THE ONE THAT IS 90 DEGREES.
Answered by Penny Nom. |
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The area of a triangle |
2003-12-01 |
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From A student:
Find the Area of Triangle ABC
A(-3,2)
B(4,0)
C(0,8)
Answered by Penny Nom. |
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Room and board fees |
2003-11-29 |
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From Jennifer:
A certain university wishes to determine room and board fees for the next academic year. For the current year, the fee is $3600 per student and 1800 students are living in the residence halls. Past data suggests that for every $300 increase in the semester fee, 200 fewer students will choose to live in the dorms. There are also costs to the university associated with the residence halls. The fixed costs total $2,000,000 per semester. the variable costs are currently $1000 per student but will fall $100 per student for each decrease of 100 students. Your task is to help the university determine the optimal fee. Assume linear relationships between the number of students and the fee and between the number of students and the cost per student
Answered by Penny Nom. |
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5.75 acres of land |
2003-11-28 |
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From Susan:
We own 5.75 acres of land here in El Paso Tx.
Some one wants to buy all or some of our land...to build homes on...but.. I can't figure a few things
1. our land is Almost exactly 500x 500x500 x500 ft square proprty
based on this can you tell me the approx perimiter measurements of EACH acre
we wish to sell approx 1/2 of this 5.75 acres ...or a tad bit less.. these are all approx measurements
what I also need to know is.. how many 50ft x 100ft lots are in each (1 )Acre???
Answered by Penny Nom. |
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A fish tank |
2003-11-26 |
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From Bill:
How do I work out the volume and weight of water in a fish tank that is 36in x 14in x 12in?
Answered by Penny Nom. |
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