 |
|
|
|
|
|
|
|
|
Functions, graphs and derivatives |
2003-10-05 |
|
From Jathiyah:
I wanted to know how would you tell (on a graph diplaying two funtions), which funtion is the derivative of the other?
Answered by Walter Whiteley. |
|
|
|
|
|
|
The slope of a tangent |
2003-10-01 |
|
From A student:
find the slope of the tangent to each curve at the given point f(x)=square root 16-x, where y=5
Answered by Penny Nom. |
|
|
|
|
|
|
A rectangle in a circle |
2003-09-27 |
|
From Abdu:
A rectangle ABCD is inscribed in a circle. If the length of AB is 5 and length of BC is 12, what is the area of circle outside the rectanlge ABCD?
Answered by Penny Nom. |
|
|
|
|
|
|
Relatively prime |
2003-09-27 |
|
From James:
what is the definition a relative prime numbers?
Answered by Penny Nom. |
|
|
|
|
|
|
0/0 |
2003-09-25 |
|
From Thomas:
How is 0/0 ever defined.
Answered by Penny Nom. |
|
|
|
|
|
|
Absolute value |
2003-09-23 |
|
From Crystal:
I am trying very hard to understand Absolute Value, and I cannot seem to grasp the idea. I do not know why we use it, what the point of it is. I do not know how to use it. I know that it is always positive or zero, and I assume it relates to distance, but how can you use it in equations. Please explain it to me as simply as possible, thank you.
Answered by Walter Whiteley. |
|
|
|
|
|
|
The golden ratio |
2003-09-23 |
|
From Phillip:
The Golden Section can be made from an equilatereral triangle inscribed within a circle. The Golden Section is achieved by joining the mid points of two arms of the triangle to the circumference. I can prove this by erecting a perpendicular to the line outside the circle, but am interested to see how it can be proved from within the circle.
Answered by Chris Fisher. |
|
|
|
|
|
|
Primes |
2003-09-23 |
|
From Julie:
#1. Suppose you are given a number (n) and told that 1 and the number (n) divide into (n). Does that mean (n) is prime? #2. Suppose that p is a prime number greater than or equal to 3. Show that p+1 cannot be a prime number.
Answered by Penny Nom. |
|
|
|
|
|
|
The Sieve of Eratosthenes |
2003-09-18 |
|
From Lynn:
My daughter has been asked to find all the prime numbers by using the Sieve of Eratosthenes. I have no understanding what this means.
Answered by Penny Nom and Claude Tardif. |
|
|
|
|
|
|
1 + 1 = 10 |
2003-09-17 |
|
From David:
could you please explain to me how 1+1=10 thanks
Answered by Penny Nom. |
|
|
|
|
|
|
Applications of logarithms |
2003-09-16 |
|
From A student:
I have a project due in my algebra two class dealing with logs and where they are used in life, but I am having trouble finding websites that relate. So I would really appreciate it if you couldhelp me.
Answered by Penny Nom. |
|
|
|
|
|
|
Notation |
2003-09-15 |
|
From Kim:
Question:
i have a couple of questions 1. write in standard form
a)4x2x8 b) 5 to the power of 4 .
.
.
Answered by Penny Nom. |
|
|
|
|
|
|
Substitution method |
2003-09-14 |
|
From John:
Hello, my name is john and while I was finishing up my work I stumbled into these problems. a/4-b=-1
a+b=11
and
6a-b=-5
4a-3b=-8 Thanks a lot. I really need some help :)
John
Answered by Penny Nom. |
|
|
|
|
|
|
The volume of an earthen pit |
2003-09-12 |
|
From Bruce:
This shape would occur at the four corners of a rectangular shaped earthen pit with sloping sides (1:1.5). Depth is 14'. Top dimensions are 170' by 158'. After calculating the easy volume components of this shape, we are left with the end corner pieces. 21' base, 14' height, side hypotenuse 25.24' and corner diagonal 32.83'. We're confused. Thank you for any help you may provide.
Answered by Penny Nom. |
|
|
|
|
|
|
The digits in 349 |
2003-09-12 |
|
From Franik:
in the number 349, which number has the least value, and why?
Answered by Penny Nom. |
|
|
