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A and B shared some beads. |
2009-02-15 |
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From Nicholas:
A and B shared some beads. A gave 1/3 to B, B will have 70 more than A. If A gave 1/5 to B, B would have 10 more than A. A have how many at first ?
Answered by Penny Nom. |
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The product of two integers their LCM and their HCF |
2009-02-15 |
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From Anonymous:
Two numbers have LCM = 60. If their product is 180, what is their HCF?
Answered by Harley Weston. |
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0/0 |
2009-02-15 |
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From Justin:
Hello, I was just wondering, what is the difference between 0/0 being represented as nullity or as an indeterminate form?
Justin
Answered by Harley Weston. |
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In what base is 3x3= 10? |
2009-02-14 |
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From David:
In what base is 3x3= 10, 3x3=11, 3x3 = 12? is there a fast way to see this or do I have to create multiplication tables until I find the right one?
Answered by Penny Nom. |
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The height of a triangle |
2009-02-14 |
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From GARIMA:
IF THE SIDES OF TRIANGLE ARE GIVEN . HOW WE WILL
CALCULATE THE HEIGHT OF TRIANGLE.
Answered by Penny Nom. |
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A fraction with negative exponents |
2009-02-14 |
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From Gabriel:
What does the line seperating the top from the bottom mean? what does it tell you to do and what is the answer to the question?
Question 3
Simplify. Write the answer using only positive exponents. Assume all variables represent nonzero numbers.
(x^-5)^-4(x^-1y)^3
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(xy^4)^3
Answered by Penny Nom. |
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Tearing down a wooden privacy fence |
2009-02-14 |
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From Dezra:
we are tearing down a wooden privacy fence, it is 180' in length and
the boards are 4"w x 6' H=A0x 1" thick
i have a truck that holds 15 cubic yards. I would like to=A0know how many loads it's going to take to haul it off.
thank you for your help
dezra
Answered by Harley Weston. |
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The floor area in a spherical space station |
2009-02-14 |
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From Ed:
I am writing a science fiction novel that involves a spherical space station with a
radius of 800 meters. Inside, artificial gravity allows parallel floors set 4 meters
apart. If you count the floor that has a radius of 800 meters as Floor 0, then the
next floor up (Floor +1) would by 4 meters above the surface of Floor 0. There
would then be Floor -1 4 meters down from Floor 0. This would continue until
you reach the top or bottom floor, where there is at least 4 meters but less than
8 meters to the top or bottom of the sphere. Obviously the top and bottom
floors would have the (same) smallest area, while Floor 0 would have about 2
million square feet.
My problem is figuring out the total area of all of the floors, or for that
matter, any particular floors or the total number of floors (the total of all the
+ floors, the - floors (these numbers will be the same) plus Floor 0.
Ed
Answered by Penny Nom. |
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The sides of a polygonal building |
2009-02-13 |
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From mark:
length of sides of an 18 ft.diameter bldg
i need to find out if i should build an octagon or decagon to keep the
sides of the bldg at 8ft or less. how do i figure the length of the sides
of each?
Answered by Penny Nom. |
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8 golfers, 5 rounds |
2009-02-12 |
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From John:
8 of us are going on a golf trip next month. We are golfing 5 rounds. Is there any way that everyone can play with each other at least twice?
I have been trying to figure it out but it always seems that someone plays with another golfer only once.
Answered by Chris Fisher. |
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Can you convert numbers with units to percents? |
2009-02-12 |
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From Kenneth:
To change a number to a percent, move the decimal two places to the right and add a percent sign.
For example, 0.35875 = 35.875%.
If the number has a dollar sign or some other kind of unit, for example, pounds, feet, etc. how is the number converted to a percentage.
For example, change $0.35875 and 0.75 lbs. to a percentage. How is this done. I have never seen $35.875% or 75 lbs.% before.
Answered by Robert Dawson and Harley Weston. |
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Large exponents |
2009-02-12 |
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From Dan:
I would like to know how to calculate a whole number as the base that
has a large exponent;Such as 7 to the 23rd.power=. Otherwise if I use a calculator
it goes off the scale.
Answered by Stephen La Rocque. |
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y = p q^t |
2009-02-12 |
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From Conor:
y= p x (q (to the power t) ) ; y= 100 when t = 2 and y= 4 when t= 0
a) find p and q
b) hence find y when t=4
Answered by Stephen La Rocque. |
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The column space of a matrix |
2009-02-12 |
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From John:
Question from John, a student:
A=
1 1 0 0
1 1 0 0
0 0 1 0
0 0 1 1
B=
1 5 6
1 5 6
0 7 2
0 0 9
Is the space spanned by the columns of A the same as the space spanned by the columns of B?
Answered by Harley Weston. |
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9 golfers |
2009-02-12 |
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From Beth:
I am organizing a golf trip for 9 women. We are playing in threesomes
and are playing four days.
I would love to mix it up so that everyone gets to play with each other
at least once. Any mathematical suggestions as to how I can make this
happen??
Answered by Robert Dawson. |
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