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	Grams and milliliters		2006-07-27
		From Poh: We would like to know the conversion of 1 gm of cream/powder to ml. Answered by Stephen La Rocque and Penny Nom.
	I want to calibrate a glucose meter		2006-07-27
		From John: If I have 3 glucose control solutions having: Low - 50 mg/dl Normal - 100 mg/dl High - 330 mg/dl I want to calibrate a glucose meter but I need more than these 3 data points. How can I mix these up to get different concentrations in between 50 and 100, 100 and 330. I would like to mix up different concentrations and put them in test tubes or whatever to do some calibration work. Like 70 mg/dl, 90 mg/dl, etc. More data points should be in between say 50 and 100 since this is normal, 90 mg/dl is considered close to normal. Answered by Stephen La Rocque.
	If all of them work together, ...		2006-07-27
		From Kakron: Pipe A can fill in 20 mins and pipe B can fill in 30 mins and pipe C can empty the same in 40 mins. If all of them work together, find the time taken to fill the tank? Answered by Stephen La Rocque.
	When 391758 and 394915 are divided by a certain three digit number, ...		2006-07-26
		From Nick: When 391758 and 394915 are divided by a certain three digit number, the three digit reminder is the same in each case. Find the divisor. Answered by Chris Fisher and Steve La Rocque.
	The capacity of our hexagon fish tank		2006-07-26
		From Doug and Andrea: My name is Andrea and my son, Doug, and I were wondering what the capacity of our hexagon fish tank was but it’s been so long since I’ve been to school that I’ve forgotten the formula to do so. Would you please help us? The dimensions are: 27 ¾ W x 24L x 29H or one side (glass panel) is 14W x 29H. Answered by Penny Nom.
	Minimizing a cost		2006-07-25
		From Edward: The cost of running a car at an average speed of V km/h is given by c= 100 + (V2 / 75) cents per hour. Find the average speed (to the nearest km/h) at which the cost of a 1000 km trip is a minimum. Answered by Stephen La Rocque.
	Converting fractions to decimals		2006-07-25
		From Diane: HOW DO I CONVERT A FRACTION TO A DECIMAL? (E.G,. 8/14 to ? ) And HOW DO I DIVIDE A FRACTION (e.g., 1/14 divided by 3) and then convert that answer to a decimal? Answered by Penny Nom.
	Percentage Difference		2006-07-25
		From Sandra: I have two numbers (1530 and 1315). How do I calculate the percentage difference. For example: I have one loader that lifts 1530 lbs. and another loader that lifts 1315 lbs. I know the difference is 215 lbs. How much greater lift capacity does the loader that lifts 1530 lbs. have than the loader that lifts 1315 lbs.? The formula that I used was: 1530 - 1315 = 215 215/1315 = .163498 or 16.3% Is this correct? Answered by Stephen La Rocque.
	A hamiltonian circuit		2006-07-24
		From Tom: 1)Prove that every simple not directed graph with 21 vertices and 208 edges has a hamiltonian circuit but not an Euler circuit. (I have proved that if we give the 2 edges for each vertices then after a few steps I have 21 vertices of odd degree and 19 edges.So in the end I have 2 vertices of odd degree.So I have not an Euler circuit.But how can I prove that there is a Hamiltonian one?) 2)If G is a tree and has a virtex k degree,prove that it also has at least k vertices degree 1. Answered by Penny Nom.
	My wife's recent pregnancy,		2006-07-24
		From Tom: During my wife's recent pregnancy, it so happened that my wife's 29th birthday fell on the exact same day that her unborn child was 29 weeks old (i.e. it was 29 x 7 days from the date of conception as advised by the doctor) I would like to know what the probability is of the above event occurring for a randomly chosen pregnant woman i.e. that the pregnant mum's x'th birthday falls on the same day that the unborn child is x weeks old EXACTLY. Answered by Stephen La Rocque.
	54x14x8 at $28.00 per cubic foot		2006-07-24
		From Toi: How much would it cost if I had an item that was 54x14x8 and it was $28.00 per cubic foot? Answered by Stephen La Rocque.
	The last two digits		2006-07-22
		From Sam: You have answered this question already but you only answered to one digit. What are the last TWO digits of: 3 to the power of 1994 7 to the power of 1994 3 to the power of 1994 + 7 to the power of 1994 7 to the power of 1994 - 3 to the power of 1994 Answered by Paul Betts and Penny Nom.
	How many miles are there in 30 furlongs?		2006-07-22
		From Jennifer: If there are 8 furlongs in a mile, how many miles are there in 30 furlongs? Answered by Steve La Rocque and Paul Betts.
	How do I draw the arc?		2006-07-22
		From Dani: How do I draw the arc (calculate the included angle) when I know only the arc length? Answered by Stephen La Rocque.
	A perpendicular intersection of two barrel vaults		2006-07-21
		From Neal: I'm wanting to build a series of architectural models of different roman and medieval buildings out of cardboard. Once I have perfected the models I want to print them out on card stock so that school kids (or anyone else) can make the buildings. A feature of many of these models is the cross or groin vault (a perpendicular intersection of two barrel vaults). A single barrel vault is easy to imagine as a plane (a rectangular piece of cardboard) that will be folded into a semi-circular arch. The intersection of a second barrel vault and this one is presenting me with problems. The second plane needs to have an ellipse cut into it so that when it is folded into the arch, it will mate up with the curve of the first barrel vault. Given that the two pieces of card have identical widths (and therefore identical arcs in cross section) is there a way to calculate the ellipse that needs to be cut so that it can be cut before the second arch is folded? Answered by Edward Doolittle.

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