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	0.687 acres in square feet.		2012-07-18
		From Roy: The land parcel I am looking at says Acreage .687 how do I determine square feet? Answered by Robert Dawson.
	A truncated cone: the central angle		2012-07-17
		From Tom: I have researched several sites, including this one and am fairly confident I can do the calculations required to produce the two radii and the slant height for a truncated cone. I a somewhat confused by the central angle. Some sites indicate that it should never exceed 180 degrees while others do not. Different examples on your site seem to use this in two different ways in constructing a truncated cone. Sometimes the angle seems to indicate the section to be removed, while in other examples the angle seems to indicate the section to be saved. Since the two angles will always total 360 I am confused about how to use the info to calculate the minimum rectangle required to contain the pattern. I'm guessing that in some cases I may need to use the chord or sagitta to determine the desired height and width of the material. Any help is greatly appreciated. Thank you. Tom Answered by Penny Nom.
	Archimedes Burning Mirror		2012-07-17
		From Frakeetta: Archimedes Burning Mirror There is a story about Archimedes that he used a “burning mirror” in the shape of a paraboloid of revolution to set fire to enemy ships in the harbor. What would be the equation of the parabola that one would rotate to form the appropriate paraboloid if it were to be designed to set fire to a ship 100m from the mirror? How large would the burning mirror need to be? What is the likelihood that this story is true? Answered by Robert Dawson.
	2 threesomes for golf over 4 days		2012-07-16
		From Jim: How to arrange for 2 threesomes for golf over 4 days equitably. Answered by Victoria West.
	Probability and curling rings		2012-07-16
		From Fatima: In the olympic event of curling, the scoring area consists of four concentric circles on the ice with radii of 6 inches, 3 feet, 4 feet, and 6 feet If a team member lands a (43 pound) stone randomly within the scoring area, find the probability that it ends up centred on a.red b.white c.blue I am explaining the figure also in words The smallest Circle is of White color then a blue colour circle then again a White colour circle then the last big circle of red color The answer for a bit is 5/9 I tried it with many ways but I am not getting the answer Please clearly tell me what is n(S)and what is n(E). Answered by Penny Nom.
	A volume of revolution		2012-07-15
		From Tewodros: Let f(x) = e^x and g(x) = x^1/2 both be defined on [0,1]. Consider the region bounded by f(x), g(x), x = 0, x = 1. Rotate this region about the y-axis and determine the volume using the shell method. Answered by Harley Weston.
	The angular elevation of the sun		2012-07-14
		From VINEET: WHAT IS ANGULAR ELEVATION OF THE SUM Answered by Penny Nom.
	A sand box with 14 sides		2012-07-10
		From Tom: Want to build a sand box for a pool that is fourteen foot round wanted to make it in fourteen pieces of wood what angle would each piece be and how long would each piece be Answered by Harley Weston.
	The height of an isosceles triangle		2012-07-10
		From ken: I am trying to determine the various heights of an isosceles triangle, if each has the same base dimension and varies in the degree of the base (equal) angles. What is the method to do this? As an example, of the base is 10, and the two equal angles are each 45 degrees, what is the height? With the same base (10), but with the two equal angles at 60 degrees, what is the height? And with the same base (10) and the two equal angles at 75 degrees, what would be the height? I know how to calculate the degrees of the third angle (add the degrees of the known angles, and subtract from 180); but am unsure if that is needed for figuring the overall height. And to be clear; I am not looking for the length of the sides of the triangle, but the height from the base to the top point. Thank you! Answered by Chris Fisher.
	2x+underroot2=3x-4-3underroot2		2012-07-09
		From Eshraj: 2x+underroot2=3x-4-3underroot2 Answered by Penny Nom.
	Six people divided into three groups of two		2012-07-09
		From Fatima: Six people call them A,B,C,D,E,F are randomly divided into three groups of two,find the probability of the below event(do not impose unwanted ordering among groups) E andF are in the same group I solved it but I have a doubt that it is wrong . My answer is 576 Please help to solve this problem. Answered by Lorraine Dame and Penny Nom.
	Finite probability		2012-07-08
		From Fatima: Tamika selects two different numbers at random from the set{8,9,10}and adds them.Carlos takes two different numbers at random from the set {3,5,6}and multiplies them.What is the probability that Tamika's result is greater than Carlo's result Answered by Penny Nom.
	Drawing cards from a standard 52-card deck		2012-07-07
		From Fatima: My daughter has to complete the project in probability chapter.Her gave her a complete probability chapter and told her to do all the problems.Out of them some questions I am not getting The question is like this please give me a detailed explanation. When drawing cards without replacement from a standard 52-card deck, find the maximum number of cards you could possibly draw and still get a. fewer than three black cards b. fewer than six spades c. fewer than four face cards d.fewer than two kings Answered by Penny Nom.
	A cubical tank		2012-07-07
		From jake: a storage tank is in the form of a cube. when it is full of water,the volume of water is 15.625 m cube. if the present depth of water is 1.3m, find the volume of water already used from tank Answered by Penny Nom.
	An octagonal sandbox around a pool		2012-06-12
		From Linda: My pool is 15 feet across and it is round. How do I measure to cut wood to build a sandbox around it? was thinking it will look like an octagon. Thanks Answered by Harley Weston.

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