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The power set of A |
2012-03-24 |
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rashdin pose la question :
Can you find a set A, |A|=4 and define a bijective function between A and P(A)?
Penny Nom lui répond. |
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Angle measures |
2012-03-21 |
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jogiboy pose la question :
how can i get the sine theta if the given is 3.14/3
Penny Nom lui répond. |
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How long will it take lee to catch up with jodie? |
2012-03-21 |
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kirsten pose la question :
for example, if jodie is on the bus travelling at 10 m.p.h and lee is walking at 4 m.p.h how long will it take lee to catch up with jodie?? what is this mathematical name for this
Harley Weston lui répond. |
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A steamroller with a 3 foot diameter and a 6 foot width makes 20 revolutions |
2012-03-21 |
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Robert pose la question :
A steamroller with a 3 foot diameter and a 6 foot width makes 20 revolutions. How much ground area does it pave?
Penny Nom lui répond. |
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Gravel, sand, cement and an equilateral triangle |
2012-03-21 |
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saheed pose la question :
how many tonnes of gravel and sand,bags of cements will be required to concrete 5feet depth/deep of 4feet equilateral triangle?
Harley Weston lui répond. |
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Two overlapping circles |
2012-03-21 |
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Monty pose la question :
If you have a 3.75" radius circle overlapping a 5" radius circle with their centers 3" apart what would be the area of the non-overlapped portion of the small circle?
Penny Nom lui répond. |
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The area of an irregular hexagon |
2012-03-20 |
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Jacob pose la question :
I am having trouble finding the area of an irregular hexagon with 5 right angles.
It has 5 given sides, with the lengths as follows:
8.2 ft.
6 ft.
4.5 ft.
2.2 ft.
6 and one third ft.
Chris Fisher lui répond. |
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Remainders |
2012-03-18 |
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Leslie pose la question :
Question: Janice has some marbles. When she divides them into groups of 4, she has 2 marbles left over. If she divides them into groups of 5, she will also have 2 left over. What is the least number of marbles she can have?
Penny Nom lui répond. |
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The length is inversely proportional to the width |
2012-03-18 |
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David pose la question :
For a given set of rectangles, the length is inversely proportional to the width. In one of these rectangles, the length is12 and the width is 6. For this set of rectangles, calculate the width of a rectangle whose length is 9
Penny Nom lui répond. |
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The price per square inch of a pizza |
2012-03-17 |
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jordan pose la question :
pizzaz pizza sells a small pizza for $10.99.it has a diameter 10 inches.what is th price per square inch ?
Penny Nom lui répond. |
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Square numbers |
2012-03-17 |
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david pose la question :
How many square numbers are there between 0 to 100?
Penny Nom lui répond. |
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A vertical line passing through (10,4) |
2012-03-16 |
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Isabelle pose la question :
Hi! My question is this:
Write the equation of each line described:
A vertical line passing through (10,4)
I would really appreciate your help!
Thanks,
Isabelle
Penny Nom lui répond. |
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Forming a triangle from 3 line segments |
2012-03-15 |
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rustom pose la question :
A point X is selected at random from a line segment AB with midpoint 0. Find the probability that the line segments AX, XB, and A0 can form a triangle.
Penny Nom lui répond. |
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Probability |
2012-03-14 |
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tom pose la question :
Let A and B be events with p(A ∪ B)= 7/8, p(A ∩ B)= 1/4, p(A' )= 5/8
Find:
a. p(A)
b. p(B)
c. P(A ∩ B')
...problem for me is that if p(A') = 5/8 then P(A) should be 1/4...so that the p(A' ∪ A) = p(A ∪ B) = 7/8...however, the book says the answer for p(A) is 3/8...does that mean, my interpretation is wrong (because if it is, then all my answers would be crap)...or is it just another typographical error?
Penny Nom lui répond. |
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An increase/decrease in profit |
2012-03-13 |
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Thanikasalam pose la question :
It is understood that increase/decrease in profit for current year compared to the previous year is done by the formula (x-y)/y, with x=profit on current year and y=profit on previous year. How do we derive this formula?
If we work on this formula of calculating increase/decrease in profit, we get x/y-1
* = (x-y)/y
= x/y - y/y
= x/y - 1
How do you justify the 1 in the equation above. How to derive the formula and how do i prove it?
Penny Nom lui répond. |
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