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Repeating decimals |
2008-03-10 |
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Blaine pose la question :
Is it possible to put a repeating decimal number into a calculator to solve a problem?
EX: Write 39.3939... as a fraction.
Penny Nom lui répond. |
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A common chord to two circles |
2008-03-09 |
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shubha pose la question :
please help me out with this problem.
find the length of the common chord of the intersecting circles x2+y2-4x-5=0
and x2+y2-2x+8y+9=0
Stephen La Rocque lui répond. |
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Average speed up and down a hill |
2008-03-09 |
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Judith pose la question :
An old broken-down ar has to travel a two miles route, up and down a hill.
Because it is so old, the car travels the first mile - the ascent - at an average
speed of fifteen miles per hour. How fast must it cover the second mile -
the decent - to achieve an average speed of thirty miles per hours?
(There is a missing variable, but what is it?)
Penny Nom lui répond. |
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Saving to buy a coat |
2008-03-09 |
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alayna pose la question :
Jackie is saving her money to buy a coat that costs $121. If she already has $61 and saves
$15 each week, in how many weeks can she buy the coat ? Make a function table to answer the
question.
Penny Nom lui répond. |
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Side lengths and area of a triangle |
2008-03-08 |
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angela pose la question :
In the diagram of ABC the angle A is 65 the angle B is 70 and the side opposite vertex B is 7. Find the length of the side opposite vertex A and find the area of ABC
Penny Nom lui répond. |
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The volume of a countertop |
2008-03-08 |
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Matthew pose la question :
I need to calculate volume down to cubic feet. I pour concrete countertops
and cant figure out the formula to convert inches and feet. If I have a 2.5 inch
by 2 foot by 16 foot concrete countertop how do I convert it to cubic feet
and hence know how many bags of concrete at .6 cubic feet per bag I will need.
I am trying to input the formula into a spreadsheet. thank you so much Matt
Penny Nom lui répond. |
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Logarithmique et semi logarithmique |
2008-03-08 |
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azaar pose la question :
Je veux savoir comment passer d'un échelle linière à l'échelle logarithmique ou semi logarithmique ?
Lierre-Louis Gagnon lui répond. |
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Probability and hair |
2008-03-08 |
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CELESTE pose la question :
MY BOSS POSED THIS QUESTION TO US. THE FIRST WITH THE CORRECT ANSWER WINS. tHANKS!
In a city of 200,000 people, no one has more than 100,000 hairs on his or her head, and no one will have fewer than 1. What are the chances that two inhabitants have exactly the same number of hairs? (Nose and ear hairs don't count.)
Penny Nom lui répond. |
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Two circles and a triangle |
2008-03-07 |
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Adrian pose la question :
The vertices of a right-angled triangle are on a circle of radius R and the
sides of the triangle are tangent to another circle of radius r. If the lengths
of the sides about the right angle are 16 and 30, determine the value of
R+r
Penny Nom lui répond. |
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Separate three different sized marbles |
2008-03-07 |
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Jana pose la question :
hello, I love this site, it explains everything so well. I have been asked a question in science, it asks for me to make a devise which separated three different sized marbles. I have thought this through alot but it still never makes sense to me. Everything i seem to think of never works out or has something that will make it not work. I'm really stuck on this one...please help me..! Thankyou so much Jana
Stephen La Rocque lui répond. |
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Composition of functions |
2008-03-07 |
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sharon pose la question :
Find FoG(x)
F(x)= the square root of x-9
G(x)= x^2
and also find GoF and their domains
Penny Nom lui répond. |
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Two perpendicular lines |
2008-03-07 |
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Daphne pose la question :
Does anyone know how to find a line perpendicular to -3x=4y=20 and
passes through the point (-12,0)?
Stephen La Rocque and Penny Nom lui répond. |
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A fence around a rectangular region |
2008-03-06 |
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sharon pose la question :
a farmer want to make a rectangular fence he has 750 feet of material . if the width is 95 feet what is the area of the rectangle
Penny Nom lui répond. |
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Cubic feet to liters |
2008-03-06 |
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chase pose la question :
if 1cu.ft=6.229 imp. gal and1 imp.gal=4.546 liters how many liters does of 128cuft. hold
Penny Nom lui répond. |
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Percent and range |
2008-03-06 |
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Greg pose la question :
How do you find out the percent of a number that is with in a range of numbers (i.e. what % is 39 of range 34 to 42)?
Penny Nom lui répond. |
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