|
|
|
|
|
|
|
|
The diameter of a circle |
2010-06-24 |
|
John pose la question : Piece of wire 72cm in length bent to make semicircle and diameter.Find
length of diameter.Answer given 28cm.How is this arrived at?Looked at
circumference in various ways but failed to understand how 28 cm was
arrived at.Thanks for the help. Robert Dawson lui répond. |
|
|
|
|
|
Rays and angles |
2010-06-24 |
|
cristina pose la question : what is the formula for finding the number of angels that can be named by a given number of rays with the same endpoint? Robert Dawson lui répond. |
|
|
|
|
|
(x^3 + 11x) is divisible by 6 |
2010-06-24 |
|
PT pose la question : Given that x is a non-zero integer,
how do you show that for all values of x,
(x3 + 11x) is divisible by 6?
I know it works but how do I answer the "all values of x" part?
Thanks in advance! Robert Dawson lui répond. |
|
|
|
|
|
Volume of a styrofoam cup |
2010-06-23 |
|
Stacy pose la question : how do you find the volume of a truncated cup with height of 3, top diameter of 2.5, and a bottom diameter of 2 Penny Nom lui répond. |
|
|
|
|
|
The equation of a circle |
2010-06-23 |
|
Michelle pose la question : Write and equation for the circle with a center, (0,0) and a diameter of 12 Penny Nom lui répond. |
|
|
|
|
|
An octagonal building |
2010-06-23 |
|
Nancy pose la question : I have to submit my approximate sq. meters of an Octagon home in
Costa Rica. All I know is all sides are equal. One structure has all sides at 16 feet and the second one has all sides equal at 8 ft. I then have to convert it to sq. meters. Can anybody help me with this? Thank you so much, Nancy Penny Nom lui répond. |
|
|
|
|
|
A linear relationship |
2010-06-22 |
|
Laura pose la question : The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $300 to drive 480 miles and in June it cost her $460 to drive 800 miles.
Question: Express the monthly cost C as a function of the distance driven d, assuming that a linear relationship gives a suitable model. Robert Dawson lui répond. |
|
|
|
|
|
Working backwards |
2010-06-22 |
|
Martha pose la question : Karen spent all but $8.00 of her savings in three stores. In each store
she spent $2.00 less than half of what she had when she went in. How
much money did Karen have at the start. Robert Dawson lui répond. |
|
|
|
|
|
Selling price, cost and profit |
2010-06-22 |
|
Alex pose la question : The profit on a certain television set is 16.5% of the cost price. If the profit is $330,
Find:
a) the cost price
b)the selling price of the television Penny Nom lui répond. |
|
|
|
|
|
The height of a triangle |
2010-06-21 |
|
Taylor pose la question : how do i find the height of a triangle with a base of 3 and a side of 5 the book says 4 but i cant get that Penny Nom lui répond. |
|
|
|
|
|
3 equidistant points on a circle |
2010-06-21 |
|
Brian pose la question : We have to line up 3 pins on a lifting bridle to be 120 degrees apart from each other to connect into a lifting assembly.
I know pi*d. I know straight lines connecting these points to each other will result in an equilateral triangle.
How does one find these points without using a protractor? There must be a formula (formulae) to work this out mathematically.
r = 10.5 inches
pi*d = 65.9736
3 segments( arcs) = 21.9912 which is the distance along the circumference that the points are from each other. Penny Nom lui répond. |
|
|
|
|
|
Geometry in the Woods |
2010-06-16 |
|
cleo pose la question : what geometric ideas can you find in the woods Walter Whiteley lui répond. |
|
|
|
|
|
A loan |
2010-06-16 |
|
melody pose la question : LOAN: 1000
TERM: 2 years
INTEREST: 2% (per month)
AMOUNT: ???
what is he formula of solving this and what is the answer.. Robert Dawson lui répond. |
|
|
|
|
|
Exponential form |
2010-06-16 |
|
charlotte pose la question : what is the exponential form of 6x6x6x5x5x5x5= Robert Dawson lui répond. |
|
|
|
|
|
1.2731568 |
2010-06-16 |
|
angel pose la question : is 1.2731568 a natural number a whole number a irrational number or a inter Robert Dawson lui répond. |
|
|