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	Infinite-Dimensional Spaces		2009-06-26
		From Justin: Hello again, I was also just wondering (in Hilbert Space and Function Space) are there infinite-dimensional spaces larger than each other in terms of cardinality? Thanks a lot for your help again! All the Best, Justin Answered by Victoria West.
	Finding Force When Pressure and Area Are Known		2009-06-25
		From chris: i need to calculate the force for a tube. given the follwing data. pressure is 900 PSI Tube is 6 m long by 1.5m Outside Diameter Answered by Janice Cotcher.
	Accuracy of Data		2009-06-25
		From Bill: If say, a predictin is 20 and the actual is 35 how do you work out the accuracy of the prediction Answered by Janice Cotcher.
	Vector Proofs		2009-06-25
		From Nazrul: If a, b, c be three vectors how can I prove that (i) -(a+b)=-a-b (ii) If a+b =c then a= c-b Thank you. Answered by Janice Cotcher.
	Greatest Number in Rounding Off		2009-06-25
		From paucath: what is the greatest number that can be rounded of to 4000 Answered by Janice Cotcher.
	Primes		2009-06-25
		From Chinonyerem: If p = 2^k - 1 is prime, show that k is an odd integer, except when k = 2. [ Hint: 3/4^n - 1 for all n >= 1.] Answered by Robert Dawson and Penny Nom.
	The surface area of a tank		2009-06-25
		From Charles: I need to calculate the external wall and top sqft surface area of a tank 54ft od x 15ft high with a dome top 54ft od x 8ft high. Answered by Penny Nom.
	A train crosses a tunnel		2009-06-25
		From Sabrina: A goods train of length one and half kilometres, is moving at a speed of 27km/hr. find the time taken by it to cross a tunnel of length seven and half kilometres Answered by Penny Nom.
	The dimensions of a cuboid		2009-06-24
		From laura: a cuboid has the surface area of 842 cm2, can you work out the dimensions? Answered by Robert Dawson and Harley Weston.
	Dividing infinity by infinity		2009-06-24
		From Justin: Hello again, I just had one other question nagging question about infinity. I read this article on "Types of Infinity" on Paul Hawkins calculus website and he stated that one infinity cannot be divided by another or that the answer is inderterminate because fundamentally infinity comes in different sizes with respect to infinite sets and that this applies also to calculus. And so I was wondering (if this is true) is this why when you divide infinity by infinity (in the extended real number system) the answer is indeterminate since fundamentally one inifnity is larger than another like in infinite sets or is there another reason? Thanks sooo much for answering my question again! I greatly appreciate it! All the Best, Justin Answered by Robert Dawson.
	(570 divided by 15) multiplied by (5 plus 26)		2009-06-24
		From Sherrie: What is the answer to this math question: (570 divided by 15) multiplied by (5 plus 26).......... Thank you, Sherrie:-) Answered by Penny Nom.
	The Pythagorean theorem		2009-06-24
		From supreet: What are some real-world applications of the Pythagorean theorem? and How are the Pythagorean theorem and the distance formula related? Answered by Harley Weston.
	Is one Infinity larger than another in the extended real number system?		2009-06-24
		From Justin: Hello there, I was wondering if one infinity is larger than another in the extended real number system (just like in the transfinite ordinals and cardinals with respect to infinite sets) or are all infinities the same size in the extended real number system? Thanks sooo much for answering my question! I greatly appreciate it! All the Best, Justin Answered by Robert Dawson.
	Math jokes		2009-06-23
		From Emily: I am teaching a whole bunch of elementary age, kids and i need some math jokes. I need math jokes that are about shapes, numbers anything that i can will be teaching over. this week is shapes though. Please, and thank you, Emily Answered by Victoria West and Harley Weston.
	Cubic meters of gravel in a 7 ton lorry		2009-06-21
		From Jackie: I have to transport gravel in a 7 ton lorry and I know how many cubic meters of gravel I need, but I need to know how many cubic meters of gravel a 7 ton lorry can hold. Thanks, Jackie Answered by Penny Nom.

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