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A point on a graph 2008-07-08
Rita pose la question :
If (2, b) is a point on the graph of y = (x^2) + 4x, find the value of b.
Leeanne Boehm lui répond.
Pounds per cubic foot 2008-07-08
Peter pose la question :
A column has a diameter of 42 feet, a height of 40 feet, and weighs 15 tons. What is the mean number of pounds per cubic foot?
Penny Nom lui répond.
Neither prime nor composite 2008-07-08
saloni pose la question :
Give the counting number which is neither prime nor composite ?
Penny Nom lui répond.
Zip codes, postal codes and 5 digit codes 2008-07-08
Mike pose la question :
Sorry if you have answered this before but I don't understand the explanations I have seen. How many possible combinations are in a 5 digit code (like a Zip Code). Is there an equation that can be used for this type of question?
Penny Nom lui répond.
Domain and range 2008-07-07
marylie pose la question :
what is the domain and range of f(x)= -sq.rootof x ^2-4??tnx
Harley Weston lui répond.
Two trains 2008-07-07
Elisha pose la question :
Trains at each end of the 50. km long Eurotunnel under the English Channel start at the same time into the tunnel. Find their speeds if the train from France travels 8. km/h faster than the train from England and they pass in 17 minutes.
Janice Cotcher and Penny Nom lui répond.
Probability and two digit numbers 2008-07-07
Peter pose la question :
What is the probability that if you multiply two randomly selected two digit whole numbers, the result is greater that 100 and less than 200. Express your answer as a common fraction.
Janice Cotcher lui répond.
A net profit of 4% on a sales volume of $100 million 2008-07-07
Muriel pose la question :
If a firm has a net profit of 4% on a sales volume of $100 million and the company has instituted logistics programs that result in cost savings of $1 million, what equivalent sales increase would be required to equal such a cost savings?

What I do know is that the net profit % has increased from 4% to 5% and the profit has gone from $4,000,000 to $5,000,000 but I have no idea what the formula is to figure out how much sales would have to increase to result in that same profit.

Janice Cotcher lui répond.
A boat travels 20 kms upstream in 6 hrs ... 2008-07-07
vidya pose la question :
A boat travels 20 kms upstream in 6 hrs and 18 kms downstream in 4 hrs. Find the speed of the boat in still water and the speed of the water current?
Penny Nom lui répond.
CIRCLES 2008-07-07
daryl pose la question :
Find the equation of the smaller circle that is tangent to the axes and the circle x(squared)+y(squared)=2x+2y-1?
Penny lui répond.
Cubic centimeters and milliliters 2008-07-07
Robert pose la question :
how many milliliters are in 750 cubic centimeters?
Harley Weston lui répond.
Would you please recommend a book 2008-07-05
Calvin pose la question :
I never enjoyed and understood the point in doing maths at high school. At college I studied Engineering and the mathematics was never covered to the level that I wanted. I want to study and fully understand and master mathematics by myself, and hence I would like a recommendation on which mathematics book I should bye. I want to understand and master every concept from logic,reasoning,axioms to algebra,calculus up to and including the latest mathematical fields and concepts.

So would you please recommend a book or books which may help me.

Claude Tardif lui répond.
Choosing a number from 1 - 400 2008-07-04
Peter pose la question :
The numbers 1-400, inclusive, are put into a hat. What is the probability that the first number chosen at random is a multiple of 4 or 17? Express your answer as a common fraction. How do you do this the question without a calculator?
Leeanne Boehm lui répond.
Divisibility by 11 2008-07-04
Peter pose la question :
For what single digit value of n is the number n53nn672 divisible by 11?
Leeanne Boehm lui répond.
Probability of Matching Socks 2008-07-04
Peter pose la question :
Rick has 6 different pairs of socks. Whats the probability that two randomly selected socks will be from a matching pair?
Leeanne lui répond.
 
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