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	Orbital velocity		2006-02-15
		From Lizzie: Assume the world is a spherical planet with a diameter of 1600 KM. with a uniform density or 5200 KM. It the moon is in a circular orbit of 630 KM. above the surface of the world,what is it's orbital velocity in metres per second?Round to the nearest WHOLE number. Answered by Stephen La Rocque.
	8 - 5r / 6 = 3		2006-02-15
		From Scott: I was trying to help my daughter with the following problem: 8 - 5r / 6 = 3 Can you give me a quick refresher. Answered by Stephen La Rocque.
	A normal distribution problem		2006-02-15
		From Mary: In a certain normal distribution, find the mean when the standard deviation is 5 and 5.48% of the area lies to the left of 78. Answered by Penny Nom.
	Percent gain		2006-02-14
		From Bill: If a stock is bought at $3.50 and sold at $5.80, what percent was the gain? Answered by Penny Nom.
	How many flat surfaces does a cylinder have?		2006-02-14
		From Kimia: How many flat surfaces does a cylinder have? Answered by Stephen La Rocque.
	Zhi Wei was born on christmas day in 1983.		2006-02-14
		From Clement: Zhi Wei was born on christmas day in 1983. His father shares the same birthday, but he was born in 1951. In which year will Zhi Wei's age be exactly 1/3 of his father's age? Answered by Stephen La Rocque.
	Victor's profit		2006-02-13
		From Millie: victor is trying to make money buying and selling cars. he saved up and buys a car for $2500 and then sells it for $4327.he then buys another car using 2/3 of his profit and sells it for twice what he paid for it. how much money did victor make during these transactions? Answered by Steve La Rocque.
	Golfing with 8 or 12		2006-02-13
		From Carolyn: I have a couple of questions that my dad asked me and I do not think it can be done in the manner he wants it to come out to. He is going on a golf trip in June. There are going to be either 8 or 12 players playing 4 rounds of golf. The questions that he says will not work and I do not know how to figure it out either is 4 Rounds of golf is for sure. 18 hole Rounds each 4 Players to a group Either 8 or 12 players can every player play with every player in a group at least once during those 4 rounds. If this can be done can you give me the combinations for both 8 and 12 , so I can help out my dad. Along with how you you figure this out. Answered by Penny Nom.
	A concrete slab		2006-02-13
		From Cheryl: A concrete area that will be used for picnic benches will measure 20 ft on each side. The concrete slab will be 8 inches deep. How many cubic feet of concrete will be needed to construct the patio? Answered by Penny Nom.
	Related rates and an oil spill		2006-02-12
		From Brandon: An Oil Tanker Spills 100,000 cubic meters of oil, which forms a slick that spreads on the water surface in a shape best modeled by a circular disc is increasing at a rate of 3m/min (it doesn't state what is increasing at 3m/min, so I'm assuming Radius until I can ask my teacher.) At t=T, the area of the "circular" slick reaches 100pi Sq. meters. A) how fast is the area of the slick increasing at t=T B)How fast is the thickness of the slick decreasing at t=T C)Find the rate of change of the area of the slick with respect to the thickness at t=T. Answered by Penny Nom.
	the size of a lot is 300 sqm, what is the square feet conversion?		2006-02-11
		From JC: the size of a lot is 300 sqm, what is the square feet conversion? Answered by Penny Nom.
	X^2 + 4X + 6 is a factor of X^4 + rX^2 + s		2006-02-11
		From Katie: If X2 + 4X + 6 is a factor of X4 + rX2 + s, then find the value of r+s? Answered by Steve La Rocque and Penny Nom.
	A lampshade shape		2006-02-11
		From Rose: Is there a solid shaped like a lampshade? Or do you just call it the bottom portion of a cone? Answered by Penny Nom.
	Is there a solid shape with 5 faces, 8 edges, and 4 vertices?		2006-02-11
		From Annie: Is there a solid shape with 5 faces, 8 edges, and 4 vertices? Answered by Penny Nom.
	Working with percentages		2006-02-10
		From Mark: Hi, i have problem...i am trying to average a group of numbers....when i try to average the average...its gives a different results: A b c d = A/(b-c) 1169 1173 1 100% 534 540 0 99% 358 359 0 100% 172 174 0 99% . . . . . . . . . . . . 2375 3422 24 70% 1976 3677 42 54% 1431 3660 53 40% 187 3433 57 6% 761 3142 39 25% 2080 2109 7 99% 38280 49121 266 78.35% When I try to average column D - it yields to 86.73% and not 78.35? Please help me Answered by Penny Nom.

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