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The diameter of a circle |
2010-06-24 |
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From John:
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.
Answered by Robert Dawson. |
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Rays and angles |
2010-06-24 |
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From cristina:
what is the formula for finding the number of angels that can be named by a given number of rays with the same endpoint?
Answered by Robert Dawson. |
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(x^3 + 11x) is divisible by 6 |
2010-06-24 |
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From PT:
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!
Answered by Robert Dawson. |
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Volume of a styrofoam cup |
2010-06-23 |
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From Stacy:
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
Answered by Penny Nom. |
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The equation of a circle |
2010-06-23 |
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From Michelle:
Write and equation for the circle with a center, (0,0) and a diameter of 12
Answered by Penny Nom. |
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An octagonal building |
2010-06-23 |
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From Nancy:
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
Answered by Penny Nom. |
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A linear relationship |
2010-06-22 |
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From Laura:
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.
Answered by Robert Dawson. |
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Working backwards |
2010-06-22 |
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From Martha:
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.
Answered by Robert Dawson. |
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Selling price, cost and profit |
2010-06-22 |
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From Alex:
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
Answered by Penny Nom. |
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The height of a triangle |
2010-06-21 |
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From Taylor:
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
Answered by Penny Nom. |
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3 equidistant points on a circle |
2010-06-21 |
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From Brian:
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.
Answered by Penny Nom. |
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Geometry in the Woods |
2010-06-16 |
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From cleo:
what geometric ideas can you find in the woods
Answered by Walter Whiteley. |
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A loan |
2010-06-16 |
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From melody:
LOAN: 1000
TERM: 2 years
INTEREST: 2% (per month)
AMOUNT: ???
what is he formula of solving this and what is the answer..
Answered by Robert Dawson. |
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Exponential form |
2010-06-16 |
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From charlotte:
what is the exponential form of 6x6x6x5x5x5x5=
Answered by Robert Dawson. |
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1.2731568 |
2010-06-16 |
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From angel:
is 1.2731568 a natural number a whole number a irrational number or a inter
Answered by Robert Dawson. |
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