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The quotient rule |
2000-02-21 |
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From Charlene Anderson:
Question: I came across a question in our book that states: Let Q(x) = N(x) / D(x) Then re-write Q(x) in a form that can utilize the Power and Product Rules. Use this rearranged form to derive the Quotient Rule. The Quotient Rule can be derived from the Power Rule and the Product Rule. One must also use the chain rule too, right?
Answered by Harley Weston. |
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Mass of the earth |
2000-02-21 |
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From Terry Broughton:
My name is terry i am 15 my question is how much does our planet earth weigh ?
Answered by Chris Fisher and Harley Weston. |
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Why counterclockwise? |
2000-02-21 |
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From Drew:
Why do the numbers of quadrants in a graph increase in a counter clockwise pattern? Why aren't they numbered increasingly in a clockwise pattern?
Answered by Chris Fisher. |
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Irrational algebraic functions |
2000-02-21 |
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From Bucky Cadena:
Here is the multipart problem: Given f(x) = x-3* squareroot of x + 4 What does the f(x) intercept equal Find the two values for which f(x) = -5 Find the one value for which f(x) = -3
Answered by Harley Weston. |
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Three factors |
2000-02-21 |
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From A parent:
Question from a parent helping a child, grade 4, with homework. Can a number have three factors? Name three numbers that have three factors.
Answered by Penny Nom. |
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Perimeter of an ellipse |
2000-02-21 |
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From Kurtis Proffit:
What is the formula for the perimeter or circumference of an ellipse?
Answered by Chris Fisher. |
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Number sense |
2000-02-17 |
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From A college student:
I am a college student and I am to answer the following question: Describe ways of telling by simple inspection when a fraction has a value close to 0; close to 1/2; and close to 1. I am to imagine that I am a 3rd grader answering this question. Any thoughts please?
Answered by Penny Nom. |
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Jogging up a hill |
2000-02-17 |
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From Aaron Williams:
A man jogs down the hill at 6 miles per hour and back up at 4 miles per hour. The total time that he travels is 5/4 hours. What is the total distance that he jogged. The solution is supposedely 3 miles, but i believe that it is 6. Can you help me? Please.
Answered by Claude Tardif. |
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A trig identity |
2000-02-17 |
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From Eric:
Question:
How do I solve this problem? sin3x cos3x _____ - _____ = 2 sinx cosx
Answered by Chris Fisher. |
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The length of a cylinder |
2000-02-17 |
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From Kelly Wichmann:
What is the formula to figure the volume of a cylinder? We have a cylinder that is 2 3/4" in inside diameter and a gallon of oil that needs to fill it. We are trying to figure out how long the cylinder should be. Can you help us?
Answered by Chris Fisher. |
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Cross multiplication |
2000-02-16 |
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From J E Swinton:
Why does cross multiplication work? How come canceling work?
Answered by Penny Nom. |
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Least Common Multiple |
2000-02-16 |
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From Kathy Heath:
The way I understand it is for 2,3,9 the least common multiple is 18. Am I right? If so, I guess the least common multiple for 3,4,7 is 105. Please let me know if I'm right so I can tell my daughter.
Answered by Denis Hanson. |
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Change for a dollar |
2000-02-16 |
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From Rachelle:
What is the least positive number of coins that is impossible to give out change for a dollar? It is higher than 50 i know and you can us dimes, nickels, pennies, quarters, 50 cent pieaces and silver dollars.
Answered by Claude Tardif. |
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2 = 1 |
2000-02-16 |
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From Chuck Kennedy:
Question: - Assume a=b
- Multiply both sides by a, a2=ab
- Subtract b2, a2-b2=ab-b2
- Factor (a-b)(a+b)=b(a-b)
- Cancel like factors a+b=b
- Substitue b for a b+b=b
- Then 2b=b
- Therefore 2=1
Question; Were is the mistake?
Answered by Claude Tardif. |
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La bissectrice de l'angle ABC |
2000-02-16 |
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From Laurent Gauthier:
Est-ce redondant d'ecrire "angle ABC" avec un accent circonflexe sur le B? Peut-on ou devrait-on se contenter d'ecrire soit ABC (avec l'accent), soit l'angle ABC (sans accent) ? Le contexte dans lequel ceci apparait est le syntagme "la bissectrice de l'angle ABC", c'est-a-dire que je me demande si on devrait ecrire "la bissectrice ABC " (avec accent), "la bissectrice de l'angle ABC" (sans accent) ou "la bissectrice de l'angle ABC" (avec accent).
Answered by Claude Tardif. |
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