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A sequence |
2009-07-11 |
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From jamie:
what is the next number in the sequence and what is the relationship of the numbers? 36,16,20,10,12, _
Answered by Penny Nom. |
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Two chords |
2009-07-11 |
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From Sarah:
Two parallel chords in the same circle have lengths of 30 cm and 48 cm. The circle has a radius of 25 cm. How far apart are the chords?
Answered by Penny Nom. |
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Arc length |
2009-07-10 |
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From farhad:
hi
i need to measure length of arc by having only two measurements, first the length of the chord and
the height of the curve.
if i have a simple calculator that haven't sin cos tang (i want to calculate it in my mind)
Answered by Stephen La Rocque. |
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A trig identity |
2009-07-10 |
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From sam:
I need to prove:
tan x (cot x + tan x) = sec2 x
(the "sec2" is "sec squared")
I am totally stuck!!
Thanks!
Answered by Stephen La Rocque and Harley Weston. |
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A circle and a chord |
2009-07-10 |
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From Paul:
I have three known points. X1,Y1 = 0,0 X2,Y2 = 3,1 and X3,Y3 = 10,0. Given these three points, how do I find the height from the center of the 10' chord to the circle's circumference above?
Answered by Stephen La Rocque and Harley Weston. |
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A base 7 number and a base 9 number |
2009-07-09 |
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From koteawarao:
Find a base 7 three-digit number which has its digits reversed when expressed in
base 9.
ans: (281) base 7 and (182) base 9
Answered by Harley Weston. |
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Multiplying Large Numbers |
2009-07-09 |
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From Jessica:
What is 12 billion X 6 trillion?
Answered by Janice Cotcher. |
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Multiplying Large Numbers |
2009-07-09 |
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From Jessica:
What is 12 billion X 6 trillion?
Answered by Janice Cotcher. |
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Passwords |
2009-07-08 |
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From Tim:
pretend I have a password that is - 9k7d4112p5o
assuming that you continuously guessed wrong until that exact
combination was the only possible answer left;
how many times would you have to guess?
capital letters are not relevant
and you do not know how many digits there are
Answered by Stephen La Rocque. |
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Log_7 (4X) = Log_14 X |
2009-07-08 |
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From Mukulu:
Help me with this question because i tried my level best to get the right answer but i failed Log_7 (4X) = Log_14X
Answered by Stephen La Rocque. |
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x^3+1/x^3=18*sqrt(3) |
2009-07-08 |
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From Nazrul:
If x^3+1/x^3=18*sqrt(3) then how can I evaluate the value of x+1/x?
Thank you for your help.
Answered by Robert Dawson. |
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The sides of a triangle |
2009-07-08 |
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From Susan:
The second side of a triangle is 5ft more than the length of the first side. The third side of the triangle is 10ft less than the length of the first side.
The perimeter of the triangle is 61ft. Find the lengths of each side of the triangle.
Thank you so much!
Answered by Penny Nom. |
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A binary equation |
2009-07-07 |
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From Chinonyerem:
Find a bitwise solution (i.e find xi so that each xi E {0,1}) to
32 = x1 + 2x2 + 4x3 + 9x3 + 20x5
Answered by Harley Weston. |
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Fractional Exponents |
2009-07-07 |
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From bob:
2^5/2 - 2^3/2
Answered by Janice Cotcher. |
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Sand for sandbags |
2009-07-07 |
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From Jerry:
How much sand do I need to fill 750 sandbags that are 26 inches by 14 inches if I fill them at 60% of their full capacity?nad
Answered by Janice Cotcher. |
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