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A champagne tower |
2010-04-16 |
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gabriel pose la question :
thanks for having something like this up online. My question is how do i build a Champagne Tower that has 290 glasses and 15 stories high.
Please help me out. this is for a clarity function.
Robert Dawson lui répond. |
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Four less than three times a number is 14 |
2010-04-16 |
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David pose la question :
My daughter has two questions that we could use some help with.
First ?
Four less than three times a number is 14
Secound?
The quotient of -15 and w
Penny Nom lui répond. |
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The area of semi circle |
2010-04-16 |
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sagir pose la question :
how to find the area of semi circle?
Penny Nom lui répond. |
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A tangent line to a circle |
2010-04-15 |
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Rhonda pose la question :
The Greek method for finding the equation of the tangent line to a circle used the fact that at any point on a circle the line containing the reauis and the tangent line are perpendicular. Use this method to find an equation of the tangent line to the circle x^2+y^2=9 at the point (1,2 square root of 2).
Penny Nom lui répond. |
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Complex roots |
2010-04-14 |
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Lan pose la question :
If b and c are real numbers so that the polynomial (x^2) + bx + c has 1 + i as a zero, find b + c.
Penny Nom lui répond. |
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Polar coordinates |
2010-04-14 |
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Lan pose la question :
Given the rectangular equation (x^2)+2x+(y^2)+y=0, find the polar equation.
Harley Weston lui répond. |
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A three digit entry code |
2010-04-14 |
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Bryon pose la question :
The entry code for the executive bathroom is a three-digit odd number
with no repeated digits. If you want to try to break in, what is the
maximum number of numbers you'll have to try?
(Remember that the three-digit numbers cannot start with zero.)
Stephen La Rocque and Penny Nom lui répond. |
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The width of a regular octagon |
2010-04-14 |
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Denise pose la question :
I need to know the measurement of an octagon on the inside from flat side to side side, not angle to angle, where the sides are 10 feet long.
Penny Nom lui répond. |
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Rational root theorem |
2010-04-14 |
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deciree pose la question :
How could i get the value of x with this equation:
1/13x^3+12x/13=1/2
Thank you!
Harley Weston lui répond. |
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A sequence |
2010-04-13 |
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Essence pose la question :
hello,
I am having trouble doing my math homework. It asks me to write the first five terms of each sequence .I can not figure it out because it is a fraction.
The Problem Is:
{2n+1/2n}
Penny Nom lui répond. |
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A geometric sequence |
2010-04-13 |
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glen pose la question :
A geometric sequence has a first term of 0.1024, a second term of 0.256,
and a middle term of 156.25. how many terms are there in the whole
sequence?
i know that r=2.5 but i dont know how to find how many terms there are.
Penny Nom lui répond. |
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A conical pile of gravel |
2010-04-13 |
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Chassity pose la question :
The gravel pile is 120' around at the base and goes up 20' high at the peak. How many tons or yards of gravel in that pile?
Penny Nom lui répond. |
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What are the dimensions of the box? |
2010-04-13 |
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Steven pose la question :
The longest rod that will just fit inside a rectangular box,
if placed diagonally top to bottom, is 17 inches.
The box is 1 inch shorter and 3 inches longer than it is wide.
How much must you cut off the rod so that it will lie flat in the
bottom of the container? What are the dimensions of the box?
Robert Dawson lui répond. |
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Two problems |
2010-04-13 |
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Dorothy pose la question :
1. Explain why the number 123, 456, 789, 101, 112 cannot be a perfect square. (Hint: What is the units digit?)
2. A substance doubles in volume every minute. At 9:00A.M., a small amount is placed in a container. At 10:00A.M., the container is just full. At what time was the container one-eighth full?
Robert Dawson lui répond. |
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Counting by sevens |
2010-04-13 |
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Larry pose la question :
Lee counted by 7's beginning with one of the whole numbers from 1 through 7, until Lee passed 1000. If Lee counted
three of the following numbers, which number did Lee NOT count?
a. 107
b. 184
c. 534
d. 641
Robert Dawson and Penny Nom lui répond. |
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