 |
|
|
|
|
|
|
|
|
Find the 3D angle |
2000-11-18 |
|
From Jacky:
Included is the diagram. I am trying to find out the angle of ABC. Is it possible? How?
Answered by Penny Nom. |
|
|
|
|
|
|
Inscribing a circle in a rhombus |
2000-11-16 |
|
From Jacky:
A rhombus ABCD is drawn in which the diagonals are 12 and 20 units long. A circle is inscribed in the quadrilateral with the centre of the circle right on the intersection point of the 2 diagonals. The circumference of the circle touches all 4 sides of the rhombus. Is it possible to find the radius of the inscribed circle? If so, how and what is it?
Answered by Chris Fisher. |
|
|
|
|
|
|
Expanding a garden |
2000-11-16 |
|
From Janeth Rojas:
Mr Jones's garden has an area of 21 squares meters. He wants to increase its size by 1/2. Draw a picture to show what his new garden might look like. Be sure to give the new area and demensions, and show your reasoning.
Answered by Penny Nom. |
|
|
|
|
|
|
Volume of a box |
2000-11-15 |
|
From A student:
A box 3" wide and 2" deep is to have a volume of 2 cubic feet. How long must the box be? How many pieces of lumber are stacked in a pile 2" high if each board is 3/8" thick?
Answered by Penny Nom. |
|
|
|
|
|
|
Dividing with decimals |
2000-11-15 |
|
From Alex:
I teach math and my class and I were discussing the dividing of decimals. I explained that if there is a decimal in the divisor, it needs to be moved and so does the decimal in the dividend. My question is why is it necessary to move the decimal point in the divisor before dividing?
Answered by Penny Nom. |
|
|
|
|
|
|
Domain of a function |
2000-11-15 |
|
From Mickey:
state any restrictions on the domain of the function. y = 5x - 12 over 27x + 6 x does not equal what________?
Answered by Penny Nom. |
|
|
|
|
|
|
Henri Leon Lebesgue |
2000-11-14 |
|
From Mandy:
I have a report that I have to do on Henri Leon Lebesgue for my Foundations of College Math class. I have searched for him on erols, google, yahoo and a few other search sites and I have only come up with one page that offered some information. I was wondering if anyone knew anything about him, or a web page that I could get some info.
Answered by Harley Weston. |
|
|
|
|
|
|
Solving an equation |
2000-11-14 |
|
From Heather:
4x-3 = 3x+4 these kinds of problems i dont get but everything else in my math class i have got. i just dont understand it.
Answered by Penny Nom. |
|
|
|
|
|
|
Five digit palindromes |
2000-11-12 |
|
From Jacky:
Positive integers such as 1287821 and 4554, in which the number is unchanged when the digits are reversed, are called palindromes. The number of five-digit integers larger than or equal to 10,000 which are not palindromes is... a. 10 000 b. 81 000 c. 89100 d. 90 000 e. 99 100
Answered by Penny Mom. |
|
|
|
|
|
|
Static electricity on an airplane |
2000-11-12 |
|
From John:
What discharges an airplane of static electricity in a electric storm when it is flying. I assume the charge is on the out side of the plane but when does it get discharged, or does it occur at landing?
Answered by Ted Mathie. |
|
|
|
|
|
|
Euler's Formula |
2000-11-11 |
|
From Denise Roberts:
I'm trying to design a unit (possibly involving a Webquest) on Polyhedra and I cannot find a formula I once used. The formula involved the number of vertices (V), edges (E), and faces (F) of the polyhedra.
Answered by Walter Whiteley. |
|
|
|
|
|
|
The magnitude of a complex number |
2000-11-11 |
|
From Jeremy:
Recently, we started studying how to graph complex numbers. Our math teacher said to use what would normally be the x-axis as the real-axis and to use the y-axis as the imaginary-axis. However, when he started talking about how to calculate magnitude, that's when I became confused. For instance...
Answered by Walter Whiteley. |
|
|
|
|
|
|
Infinite Geometric Series |
2000-11-10 |
|
From Sam Carter:
I ran into a problem when studying how to find the sum of an infinite geometric series. My math book attempts to explain the concept by giving formulas involving sigma and |r|, but it does not really explain how to go about finding the sum of an infinite geometric series. If you could either help me with this or point me in the direction of an informative website that could help me, I'd appreciate it.
Answered by Harley Weston. |
|
|
|
|
|
|
Rhombuses |
2000-11-07 |
|
From Melissa:
What in real life is the shape of a rhombus?
Answered by Chris Fisher and Walter Whiteley. |
|
|
|
|
|
|
How big is a trillion? |
2000-11-07 |
|
From A teacher:
How can you explain how much a trillion is to a 5th grade class?
Answered by Penny Nom. |
|
|
