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30 students |
2009-08-06 |
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Peter pose la question :
Question from Peter, a student:
Can you please help with the following questions?
(a) It is known that among any group of the three students in a class two of them are friends. Total number of students is 25. Prove that there is a student who has at least 12 friends.
(b) There are 30 students in a class. They sit at 15 double desks, each one is for two students. Half of the girls sit with boys. Is it possible to make a rearrangement so that half of the boys sit with girls?
Penny Nom lui répond. |
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Exponential form |
2009-08-05 |
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motaz pose la question :
Let x = log_2 1/8 Write the exponential form of the equation and solve the equation for x
Stephen La Rocque lui répond. |
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Susan's RRSP |
2009-08-05 |
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Polly pose la question :
Susan contributed $500 every 6 months for 14 years into a RRSP earning interest @ 7.5% compounded semi-annually. Seven years after the last contribution Susan converted the RRSP into a RRIF which is to pay her equal 1/4 payments for 16 years. If the first payment is due 3 months after the conversion into the RRIF and the interest on the RRIF is 9% compounded 1/4, how much will Susan receive every 3 months?
Stephen La Rocque lui répond. |
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Percentage decrease |
2009-08-04 |
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Bill pose la question :
How to calculate the Percentage Increase or Decrease of a $ value.
Example -
Site Spend for 01-01-2008 thru 07-31-08 was $ 3,465,660
Site Spend, 2009 YTD as of 07-31-09, was $ 1,673,405
Site Spend down what % between these two amounts ?
Penny Nom lui répond. |
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Angular speed |
2009-08-04 |
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Mary pose la question :
The engine of a sports car rotates at 5000 revolutions per minute (rpm). Calculate the angular speed of the engine in radians per second. Use 2 radians = 1 revolution.
Penny Nom lui répond. |
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Tossing a penny 26 times |
2009-08-04 |
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Basma pose la question :
Jack is going ot toss a penny 26 times.
How many times should it land on heads?
Robert Dawson lui répond. |
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A spherical dome |
2009-08-03 |
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Eric pose la question :
I have recently been asked to resurface a dome sculpture for my local council but i'm having problems working out the area. Here are the dimensions.
The height of the dome is 3m from the ground to the top of the arc. The arc itself from the ground rising up to the 3m point and back down, is 10m. The dome is 7m wide from one side to the other through the centre, at ground level.
I hope there is enough detail here. It's been a long time since i was in a maths class.
Thank you, hope to here from you soon!
Stephen La Rocque lui répond. |
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I expect to retire in 12 years |
2009-08-03 |
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Polly pose la question :
I expect to retire in 12 years. Beginning one month after my retirement, I would like to receive $500 a month for 20 years. How much must I deposit into a fund today to be able to do so if the rate of interest on the deposits is 12% compounded monthly?
Stephen La Rocque lui répond. |
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HCF |
2009-08-03 |
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Nazrul pose la question :
If (x+ a) be the H,C.F. of x^2+px+q and x^2+mx+n, prove that (p-m)a=q-n
Stephen La Rocque lui répond. |
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Math in everyday life |
2009-08-03 |
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Naveen pose la question :
Dear sir,
We are advised to do a project on "Mathematical modeling to solve various problems
of our everyday life/environmental related problems...... Can u plz help us by mailng some
ideas, suggestion,reference to make my project successful.... Thanking you......
Waiting for your favourable reply......
Penny Nom lui répond. |
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Two circles |
2009-08-03 |
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Karan pose la question :
We are given 2 circles with radii 12cm and 3 cm. We have to find AB
Penny Nom lui répond. |
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A cone with the top cut off |
2009-08-02 |
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Paul pose la question :
I am making a cone with a diameter of 1300, a base of 500, a side length
800. I need to workout so I can draw it out flat, cut it out, and make into
a cone.
Harley Weston lui répond. |
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A walkway around a flower garden |
2009-08-01 |
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Barbara pose la question :
A rectangular flower bed measuring =C2=A0 10 feet by 15 feet =C2=A0 has a surrounding walkway on all sides that measure 186 square feet. How wide is the walkway?
Harley Weston lui répond. |
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root 2 is irrational |
2009-07-31 |
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prateet pose la question :
prove that root2 is an irrational number.
Robert Dawson lui répond. |
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Fencing five acres |
2009-07-31 |
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Aaron pose la question :
Ok So I need to order fencing for my property I have 5 acres and would
like to fence in the perimeter, I cant for the life of me figure out how
many feet of fencing to order for help please im an idiot.
Robert Dawson lui répond. |
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