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Congruent figures |
2008-12-28 |
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From peter:
are a 2 by 4 rectangle and a 1 by 8 triangle congruent?
Answered by Harley Weston. |
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100 yds of concrete |
2008-12-28 |
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From Carol:
how much money is a 100 yds of concrete @ $80cy?
Answered by Penny Nom. |
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A cubic yard of concrete |
2008-12-28 |
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From David:
assuming that one cubic yard of concrete is 4” thick and 3’ long, how many square feet does it cover?
the answer is 27 but im not sure how. i spent a lot of time and i still can't figure it out. thank you!
Answered by Penny Nom. |
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Permutations and combinations |
2008-12-28 |
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From KHADIJA:
What's the difference between Permutation and Combination?
Answered by Penny Nom. |
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What is i^i? |
2008-12-27 |
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From randomness:
i have learnt that 'i' is square root of -1. What is then i^i ? It baffles my maths teacher...
Answered by Robert Dawson and Penny Nom. |
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La longueur de la corde |
2008-12-24 |
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From Lucile:
Voici l'énoncé :
On appelle (C) un cercle de centre O et de rayon 6cm.
A et B sont deux points du cercle (C) tels que AOB = 50°
Calculer la longueur de la corde [AB] (arrondi au millimètre).
On justifiera soigneusement toutes les étapes.
Cela fait déja 1 semaine que je trouve pas la réponse a cet énoncé .
Pouvez vous m'aider ? Merci d'avance .
Answered by Pierre-Louis Gagnon. |
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Two rectangular plots have the same area |
2008-12-23 |
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From Jason:
Two rectangular plots have the same area. The first has a perimeter of 40m while the second has a length 2m less than the first and a width 1m greater. Find the length and breadth of the first rectangle
Answered by Stephen La Rocque. |
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The area of a triangle |
2008-12-23 |
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From ashiya:
Hi,
I have attached figure of the triangle, Can you please help to find the area of Triangle ABC.
Thanks.
Ashiya
Answered by Stephen La Rocque. |
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24 golfers playing golf for 9 rounds |
2008-12-23 |
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From Duane:
Got 24 golfers playing golf for 9 rounds. Any formula where everyone can play with everyone else at least once. We are playing 4somes only. Thanks, Duane
Answered by Victoria West. |
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The base of a triangular pyramid |
2008-12-20 |
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From joe:
triangular pyramid
base height=
base width=8ft
height=6ft
volume=88ftcu.
Please explain base height & how to solve.
Answered by Penny Nom. |
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Pouring angles for a crucible |
2008-12-20 |
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From Richard:
I am trying to work at pouring angles and volume left in during pouring a crucible, The crucible is cylindrical and flat bottomed.
I know the diameter, radius and volume of the crucibles. and the volume of liquid going into it.
So lets say the crucible is only half full firstly I need to work out the angle just before its going to pour. ( I can work this out as long as there is a certain volume of liquid if its not enough I cant do it)
Now the problem I also need to work out how much I should tilt the crucible to allow a certain amount out and be able to do this untill the volume reaches 0 at 90' turn. This is where I am stuck.
The reason for needing to be able to work this out is so i can develop a constant flow for example 10Kg of metal per second.
Thank you very much for you time
Answered by Harley Weston. |
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A spill of oil on a flat surface |
2008-12-19 |
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From Phillip:
Hello, my question is: If I spilled 25 gallons of diesel fuel on a flat surface how much area would the spill cover?
How would I mathematically figure it out?
Thanks!
Answered by Robert Dawson and Harley Weston. |
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A standard bill on a highway |
2008-12-19 |
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From Stephanie:
A standard bill on a highway has a perimeter of 14 feet. the length of the bill board is 6 feet greater than triple the width.
What is the length?
what is the width?
Answered by Robert Dawson and Penny Nom. |
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Three circular rings |
2008-12-18 |
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From seema:
three circular rings of equal radii of 1cm each are touching each other.
a string runs all around the set of rings very tightly. what is the minimum length
of string required to bind all the three rings ?
Answered by Robert Dawson. |
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Three circles inscribed in a circle |
2008-12-18 |
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From seema:
three equal circles each of radius 1 cm are circumscribed by a larger circle.find the perimeter
of circumscribing circle?
Answered by Robert Dawson. |
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