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l'Hospital's rule 2007-10-28
From SWAPNA:
Evaluate the following limit using L'Hospitals Rule
lim (sin x/x) ^ 1/(x^2)
x-->0

Answered by Harley Weston.
A circle is inscribed in a square 2007-10-28
From Carolyn:
A circle is inscribed in a square. What percentage of the are of the square is inside the circle.
Answered by Victoria West.
An equalateral triangle is 30 acres 2007-10-28
From mike:
If the area of an equilateral triangle is 30 acres, what is the length of each side in feet or miles?
Answered by Penny Nom and Victoria West.
Complex numbers 2007-10-27
From Dylan:
My problem is to prove:

|z|^2 = zz* Where z is the complex number x + iy and z* is it's complex conjugate x - iy.

If the absolute value of i is 1, then it looks like: |z|^2 = |x+y| |x+y| = x^2 + 2xy + y^2

And zz* = x^2 + y^2. for these to be equal, 2xy = 0. This seems wrong to me. What am I doing wrong?

Answered by Penny Nom.
The realtionship between lcm and gcd 2007-10-27
From Brenda:
why does multiplying lcm of (n,s) by gcd (n,s) give n times s. when (n,s) are any two numbers?
Answered by Penny Nom.
How to solve related rates problems 2007-10-27
From David:
Can you plz explain how and where you come up with an equation to solve this?
Find the rate of change of the distance between the origin and a moving point on the graph of y = sin x if dx/dt = 2 centimeters per second.

Answered by Stephen La Rocque.
Place value 2007-10-27
From eric:
True or False: In the number 378, there are 3 hundreds, 7 tens, and 8 ones.
Answered by Penny Nom.
a/5= b/7= 8/3 2007-10-27
From Kristine:
how do you solve for a and b in this equation:

a/5= b/7= 8/3

Answered by Penny Nom.
Converting millimeteres to inches 2007-10-27
From Alison:
I am hoping to buy a cabinet, the measurements are 1120mm x 560mm, what is that in feet & inches.
Answered by Penny Nom.
Is there a practical use for radian measure? 2007-10-26
From Paula:
Is there a practical use for radian measure in any profession? Which professions might us radian as opposed to degree measure?
Answered by Harley Weston.
What is the rent? 2007-10-26
From Mark:
Rent was $1.00 per cubic yard. Dimensions were 36 feet by 200 feet by 12 feet high. What is the rent
Answered by Penny Nom.
The largest number you can add ... 2007-10-26
From Dryden:
What is meant by asking what is the greatest number you can add to that number without having to regroup in any place?
Answered by Penny Nom.
collinear points 2007-10-26
From Carl:
the points H,S,D,K,L, and B are collinear.
KS+SB=KB
DH+HS=DS
DH+HK=DK

point L and B are not between any other labeled points on the line.
<------------------------------------------------------------------------->

Answered by Penny Nom.
I need to rebuild a wagon wheel 2007-10-26
From Pat:
I need to rebuild a wagon wheel, the metal wheel rim is 41" diameter, inside the rim is a one and a half inch by one and a half inch wood wheel. I thought I would glue up a hexagon from a 2x6 or 2x8 piece of wood and then draw and cut out the 41" diameter wood circle. ? what would work better the 2x6 or the 2x8 and what is the lenghth of the cuts needed in order to give me the 41' diameter I need.
Answered by Harley Weston.
Area of a triangle formed by three points on a graph 2007-10-26
From Betty:
My question is 'find the are of a triangle whose vertices have coordinates (3,5),(6,-5), and (-4,10)
Answered by Stephen La Rocque.
 
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