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Hexagonal pyramids |
2007-05-17 |
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From Tracey:
How many faces, edges, and vertices does a hexagonal pyramid have?
Answered by Stephen La Rocque. |
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Percent difference |
2007-05-17 |
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From Carolyn:
What is the % difference between these two numbers 211373 & 185420
Answered by Gabriel Potter, Penny Nom and Steve La Rocque. |
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Altitudes of scalene triangles |
2007-05-17 |
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From Chris:
Two of the altitudes of a scalene triangle ABC have length 4 and 12.
If the length of the third altitude is also an integer, what is the biggest
that it can be?
Answered by J. Chris Fisher. |
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Cost of replacing a driveway |
2007-05-17 |
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From Chris:
A homeowner needs to replace a driveay which is 12 feet wide and 90 feet long. The old driveway needs to be dug out. It is 9 inches deep. It costs $35 per cubic yard to remove the old driveway and $75 per cubic yard to lay the new one. What will be the cost of the complete job?
Answered by Penny Nom. |
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Parabolas |
2007-05-16 |
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From Andy:
How do you write an equation of a parabola that opens to the left with a vertex of (2,-6)?
Answered by Stephen La Rocque. |
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Comparing the areas of various shapes |
2007-05-16 |
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From Kathy:
If the perimeters are the same, which has the greater area, a circle, a square, an ellipse, or an octagon?
Answered by Stephen La Rocque. |
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All the possible 8 digit combinations of 0-9 |
2007-05-16 |
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From Christofer:
What are all the possible 8 digit combinations of 0-9? List please
I know that there are 43046721 combinations but I want to know
what they are.
Answered by Stephen La Rocque. |
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Buying topsoil |
2007-05-16 |
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From Claudia:
I am trying to figure out if it is cheaper to buy topsoil by the bag (one 40lbs bag for $1.66) or having it delivered for $60 for 4 cubic yards.
Answered by Penny Nom. |
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4 digit lock |
2007-05-16 |
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From Kathy:
Hi,
My name is Kathy and I'm a REALTOR, I have 2 different lockboxes that
I cannot remember the combinations for, so what I need is all the
different combinations for 4 digits that cannot be the same, i.e. 0123.
Can you help me out? I would hate to throw them away as they cost
about $30 each.
Thank you,
Kathy
Answered by Stephen La Rocque. |
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What's a vertex? What's an edge? |
2007-05-16 |
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From Sophie:
I don't understand what is a vertex and what is an edge. Please put a picture up and explain. I am a fifth grader.
Answered by Brennan Yaremko and Steve La Rocque. |
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Using BEDMAS |
2007-05-16 |
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From Dishant:
I know BEDMAS but im very cofused with this question. The question is 3-2(5x2)x2+7. Can you please help me?
Answered by Penny Nom. |
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Je veux convertir le m3 en kg |
2007-05-14 |
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From Abdellah:
je veux convertir le m3 en kg
Answered by Claude Tardif. |
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Volume of a wedge |
2007-05-14 |
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From Mark:
We need to fill in dirt along a 75 foot long fence, 3 feet out , statring at 6 inches agaisnt the fence, sloping to 2 inches at the grass. I am trying to calculate the volume to order enough cubic yards of dirt to fill this.
Answered by Stephen La Rocque. |
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Maximizing the volume of a cone given the slant length |
2007-05-14 |
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From Christina:
A coffee filter for a new coffee maker is to be designed using a conical filter. The filter is to be made from a circle of radius 10cm with a sector cut from it such that the volume of coffee held in the filter is maximised. Determine the dimensions of the filter such that the volume is maximised.
Answered by Stephen La Rocque and Kerstin Voigt. |
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Weight per area conversions |
2007-05-13 |
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From Dermot:
A lawn weedkiller to be spread at the rate of 35g per Sq meter. My new spreader is calibrated in lbs per 1000 sq ft !!!!
Answered by Penny Nom and Stephen La Rocque. |
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