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A champagne tower |
2010-04-16 |
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From gabriel:
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.
Answered by Robert Dawson. |
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Four less than three times a number is 14 |
2010-04-16 |
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From David:
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
Answered by Penny Nom. |
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The area of semi circle |
2010-04-16 |
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From sagir:
how to find the area of semi circle?
Answered by Penny Nom. |
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A tangent line to a circle |
2010-04-15 |
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From Rhonda:
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).
Answered by Penny Nom. |
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Complex roots |
2010-04-14 |
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From Lan:
If b and c are real numbers so that the polynomial (x^2) + bx + c has 1 + i as a zero, find b + c.
Answered by Penny Nom. |
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Polar coordinates |
2010-04-14 |
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From Lan:
Given the rectangular equation (x^2)+2x+(y^2)+y=0, find the polar equation.
Answered by Harley Weston. |
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A three digit entry code |
2010-04-14 |
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From Bryon:
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.)
Answered by Stephen La Rocque and Penny Nom. |
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The width of a regular octagon |
2010-04-14 |
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From Denise:
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.
Answered by Penny Nom. |
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Rational root theorem |
2010-04-14 |
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From deciree:
How could i get the value of x with this equation:
1/13x^3+12x/13=1/2
Thank you!
Answered by Harley Weston. |
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A sequence |
2010-04-13 |
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From Essence:
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}
Answered by Penny Nom. |
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A geometric sequence |
2010-04-13 |
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From glen:
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.
Answered by Penny Nom. |
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A conical pile of gravel |
2010-04-13 |
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From Chassity:
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?
Answered by Penny Nom. |
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What are the dimensions of the box? |
2010-04-13 |
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From Steven:
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?
Answered by Robert Dawson. |
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Two problems |
2010-04-13 |
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From Dorothy:
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?
Answered by Robert Dawson. |
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Counting by sevens |
2010-04-13 |
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From Larry:
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
Answered by Robert Dawson and Penny Nom. |
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