 |
|
|
|
|
|
|
|
|
The volume of a pond |
2008-11-04 |
|
From Malcolm:
I am looking for a formula to find the volume of my pond. I know the average surface diameter and the average bottom arc length.(The arc from one bank through a point in the bottom and on to the surface on the other bank. I am not able to get a good measurement of the depth at this time. Can the volume be figured with the known measurements (the cord and the arc)? Thanks: MS
Answered by Harley Weston. |
|
|
|
|
|
|
A trig identity |
2008-11-03 |
|
From Student:
verify cos(2x)=(cot(x)-tan(x))/(cot(x)+tan(x))
Answered by Penny Nom. |
|
|
|
|
|
|
Partial variation |
2008-11-03 |
|
From Diamond:
what are the 2 parts of partial variation?
Answered by Penny Nom. |
|
|
|
|
|
|
Job applicants |
2008-11-03 |
|
From dave:
Three-fourths of the applicants for a position had previous experience. If 144 people
applied, how many had previous experience? How many did not have previous experience.
Answered by Penny Nom. |
|
|
|
|
|
|
A belt drives a pulley |
2008-11-03 |
|
From Rebecca:
A point on a belt is moving at the rate of 30 ft/sec and the belt drives a pulley at the rate of 200 rpm. What is the radius of the pulley?
Answered by Penny Nom. |
|
|
|
|
|
|
An arch is in the form of a semi ellipse |
2008-11-03 |
|
From jessica:
An arch in the form of a semi ellipse has a span of 10 meters and a
central height of 4 m. Find the heights of the arch at a point of 3 meters from the semi minor axis.
Answered by Penny Nom. |
|
|
|
|
|
|
Three consecutive odd integers |
2008-11-03 |
|
From kim:
Determine three consecutive odd integers such that twice the sum of the second and third is 29 less than 5 times the first.
Answered by Penny Nom. |
|
|
|
|
|
|
The part before the repetend |
2008-11-02 |
|
From Puerto:
Hello,
I teach mathematics in a bilingual programme using English. I have learned that the group of digits that repeat in a repeating decimal is called repetend but i need to know how are called the previous ones when the decimal is a delayed-repeating one. I mean, in 0.34555555 5 is the repetend, the period is one and...how are called 34?
Thanks in advance.
Answered by Stephen La Rocque and Penny Nom. |
|
|
|
|
|
|
Intercepts |
2008-11-02 |
|
From robert:
What is the sum of the x-intercept and y-intercept of the line 3x-3y=24?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
A goat tied to a rectangular barn |
2008-11-02 |
|
From Misty:
If there is a goat tied to a rectangular barn on a 50 foot
lead and the barn is 20 feet by 20 feet (floor).
When the rope goes around the barn, what is the new
radius and How much of a circle can it make without hitting the barn or
overlapping area you've already found and What is that area?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
The prime factorization of one billion |
2008-11-02 |
|
From Alta:
The prime factorization of 1000 is 2 cubed times 5 cubed. How do you write the prime factorization of one billion using exponents?
Answered by Penny Nom. |
|
|
|
|
|
|
A circle tangent to a line and with its centre on another line |
2008-11-01 |
|
From liza:
Find the equation of the circle of radius squareroot 26 tangent to the line 5x+y=13 and having its center on the line 3x+y+7=0.
Answered by Chris Fisher. |
|
|
|
|
|
|
The diameter of a circle |
2008-11-01 |
|
From lupito:
a circle has a 30`sector,33pi.find the diameter of the circle.How do I set the equation up.
Answered by Victoria West. |
|
|
|
|
|
|
How far does the ball travel? |
2008-11-01 |
|
From Betty:
This is a question that is perplexing me. I tried to solve it with the Pythagorean Theorem but have not been able to get the right answer. A ball attached to the moving end of the 5-meter arm of a pendulum. The pendulum swings through a 90 degree arc once. Approximately how far, in meters, does the ball travel?
Answered by Victoria West. |
|
|
|
|
|
|
The angles of a triangle |
2008-10-31 |
|
From kyla:
an isosceles triangle has two 50 degrees angles.what is the measure of the third angle? explain how you found your answer.
Answered by Penny Nom. |
|
|
