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An arc of a circle |
2003-03-12 |
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From Melissa:
A strip of wood is 16 ft. long and is bent in the arc of a circle. Two radii, from the center of the circle to the ends of the arc, form a right angle. What is the approximate distance from one end of the wooden arc to the other?
Answered by Penny Nom. |
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Harmonic numbers |
2003-03-12 |
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From Becky:
What can you tell me about the limit of harmonic numbers as it reaches infinity?
Answered by Penny Nom. |
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Monomials |
2003-03-11 |
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From Roxy:
Explain why (x+y)z is not equal to xz+yz? P.S. Z is an exponent
Answered by Penny Nom. |
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Surface area of a sphere |
2003-03-11 |
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From Kim:
a sphere has a surface area of 128 pi sq. units. What is its exact radius?
formula is 4 pi r2 I believe but how do I get radius
Answered by Penny Nom. |
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Division names |
2003-03-10 |
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From A parent:
what is the answer to a division problem called
Answered by Penny Nom. |
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Three digit number |
2003-03-10 |
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From Grace:
What three digit positive integer is exactly 32 times the sum of its digits?
Answered by Claude Tardif. |
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A question on combinations |
2003-03-06 |
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From Jose:
I'm an architect student and have a question on combinations. I have a grid of 3 x 3, hence a total of 9 spaces. I have 3 elements to place in this grid. How many possible ways are there of arranging this elements on this grid ? (order, orientation not important) First putting the elements each in its own space and secondly allowing the elements at a given moment to "share" one space. Since I got kind of obsessed with this I went ahead and graphically did all the combinations allowing "sharing", a grand total of 729. How could I have known this before hand ?
Answered by Penny Nom and Claude Tardif. |
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Mary typed a six digit number |
2003-03-06 |
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From Pillar:
Mary typed a six digit number, but the two 1's did not show. What appeared instead was 2002. How many different six-digit numbers could she have typed?
Answered by Penny Nom. |
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(n+17)(n+7) = 0 |
2003-03-05 |
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From Janea:
What is the answer to 1. (n+17)(n+7)=0 What is the answer to:2. (y-15)(y-100)=0
Answered by Penny Nom. |
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Can a square be a rhombus? |
2003-03-04 |
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From Beth:
Can a square be a rhombus? Some sources say yes, some say no. Some sources define a rhombus as a quadrilateral and parallelogram with equal sides, but without right angles. Some sources say a square is a special case of a rhombus. Clarity, please!
Answered by Walter Whiteley. |
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y < 2x + 1 |
2003-03-01 |
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From Erika:
how can I solve and graph y<2x+1 and which side in the graph should i shade after i finish solving my inequality?
Answered by Penny Nom. |
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Finding the area when the perimeter is known |
2003-02-28 |
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From Yvette:
What is the size of an area in sqare feet when the perimeter totals 842 feet.
Sides are 190ft+180ft+200ft+54ft+118ft+100ft.
Answered by Penny Nom. |
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______cm=0.048km |
2003-02-27 |
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From Antonette:
______cm=0.048km
Answered by Penny Nom. |
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Can a square be considered a rectangle? |
2003-02-27 |
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From Carla:
Can a square be considered a rectangle? (since opposite sides are same length and parallel) Would a regular hexagon or octagon be considered a parallelogram since its opposite sides are parallel? or does a parallelogram HAVE to have only 4 sides?
Answered by Penny Nom. |
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A number line |
2003-02-27 |
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From Shery:
My seventh grader problem of the month 0__________1______________5____> This is a arrow, the number should be below A.Mrs Decker created an arrow representing a number line shown above. She wanted to find points and label them with a heart (G) for Valentine's Day so that the fraction 5/g is less than 1. (be sure to mark the G and not the fraction 5/g). She pondered, "Are there any other locations for G?" Is so help her description the location of all these points. If not why not?
Answered by Penny Nom. |
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