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	Sec(2x)		2008-11-23
		Evan pose la question : Prove that this is an identity... sec2x = sec^2x / 2 - sec^2x Harley Weston lui répond.
	Tan(3x)		2008-11-23
		Evan pose la question : Derive an expression for tan3x in terms of tanx Harley Weston lui répond.
	How fast is the length of his shadow changing?		2008-11-22
		Desiree pose la question : A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 2.3 m/s, how fast is the length of his shadow on the building decreasing when he is 4 m from the building? Harley Weston lui répond.
	Cubic yards of fill dirt		2008-11-22
		Donnie pose la question : I need to know the formula to figure cubic yds of fill dirt to fill an area from 4ft. deep to 18 inches deep this lot is on a slope and I am wanting to level 176 ft long by 4ft. deep the sides is 115 ft. wide the upper side is 18 inches deep. Harley Weston lui répond.
	Solve 3x +5= 4x-10		2008-11-22
		Nikko pose la question : HELP please how do I solve these type of questions? 3x +5= 4x-10 or 4x +10= 6x-8 Penny Nom lui répond.
	Profit as a percentage		2008-11-21
		Nomar pose la question : Cost Price is $ 556,109.64 and Selling price is $ 1,020,936.00, What is the Profit Percentage? Harley Weston lui répond.
	Walking around a square 3.50 acre property		2008-11-21
		Ann pose la question : How many times do I have to walk around the perimeter of my square 3.50 acre property to achieve 1 mile? Penny Nom lui répond.
	There are 30 marbles in a bag		2008-11-21
		Cori pose la question : There are 30 marbles in a bag. Twice as many red, as blue, and 1 more green than there are red. What is the probability that when one is pulled out, it will be red? Penny Nom lui répond.
	Factor 9x^2 + 6x + 4		2008-11-21
		Jonah pose la question : how can i solve this by factoring: 9x^2 + 6x + 4 Harley Weston lui répond.
	The distribution of sample sums		2008-11-21
		Mark pose la question : For large samples, the sample sum (Σ x) has an approximately normal distribution. The mean of the sample sum is n*μ and standard deviation is (σ*√n). The distribution of savings per account for savings and loan institution has a mean equal to $750 and a standard deviation equal to $25. For a sample of 50 such accounts, find the probability that the sum in the 50 accounts exceeds $38,000. Penny Nom lui répond.
	Evaporation of waste water		2008-11-21
		Alexandra pose la question : Engineers know that the amount of water lost due to evaporation is directly proportional to the surface area of the holding tanks and that the local climate causes water to evaporate at the rate of about gallon of water per hour for each square foot of water exposed to the air. About how many total gallons of waste water may enter the three tanks each day to maintain full capacity? I know that the answer is 50x10^3 but i don't know why. Penny Nom lui répond.
	15 cubic yards of dirt		2008-11-20
		Phillip pose la question : How far, in feet, will 15 cubic yards of dirt cover, if I'm laying it 12 feet wide and 4 inches deep? Please provide formula. Penny Nom lui répond.
	The nth term of a sequence		2008-11-20
		kim pose la question : Find the next 2 terms of the sequence. 11n+2.5 Harley Weston lui répond.
	Four circles in a square		2008-11-19
		Anthony pose la question : I have a square where one side measures 10cm and within that square There are four equal quarter circles. Each quarter circles starts in a different corner of the square and I am trying to find area inside the overlap on the quarter circles. Janice Cotcher, Chris Fisher and Penny Nom lui répond.
	The range of a set of numbers		2008-11-19
		krista pose la question : hi, i was working on a math problem for homework and it asked me to find the range out of these numbers: 1,15,16,16,19,25,27,28,28, can you help me? Penny Nom lui répond.

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