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	Overbooking flights		2008-07-10
		DON pose la question : Overbooking by Airlines This is a simplified version of calculations used by airlines when they overbook flights. They realize that a certain percentage of ticketed passengers will cancel at the last minute. Therefore, to avoid empty seats, they sell more tickets than there are seats, hoping that just about the right number of passengers show up. We will assume that the no-show rate is five percent. For a flight with 220 seats, the airline wants to find how sensitive various probabilities are to the number of tickets it issues. In particular, it wants to calculate a) the probability that more than 225 passengers show up b) the probability that more than 220 passengers show up c) the probability that at least 215 seats will be filled d) the probability that at least 210 seats will be filled. To assess the benefits and drawbacks of issuing various numbers of tickets on an airline flight with 220 seats, create a table showing as many different scenarios as possible (table only on one page when printed) and use a second page for your analysis and recommendation to the airline. Which are the good cases, which are the bad cases for the airline? Janice Cotcher lui répond.
	Two numbers whose sum is 25 and whose product is 120		2008-07-10
		Michelle pose la question : Solve the following problem in at least two different ways. Find two numbers whose sum is 25 and whose product is 120. I know how to solve this problem by creating two equations x+y=25 and xy=120 and then use substitution. Are there any different ways of solving this problem? Janice Cotcher and Penny Nom lui répond.
	How far is the ladder from the wall?		2008-07-10
		Al pose la question : a ladder is leaning against a wall at a 70 degree angle and the ladder is 20 feet tall...how far away is the ladder from the wall Penny Nom lui répond.
	What is the account value after 3 years?		2008-07-10
		Carlos pose la question : Question Suppose that you deposited $3,000 at the beginning of each year for three years in a savings account earning 4%. What is the account value after 3 years (approx)? a. 9,120 b. 9,211 c. 9,739 d. 9,989 Penny Nom lui répond.
	A convex quadrilateral in spherical geometry		2008-07-09
		Joan pose la question : What is the min and max number of obtuse angles possible ia a convex quadrilateral in Spherical Geometry? I know that the Saccheri has 2 obtuse angles and the Lambert has one, but are there other possibilities? Thanks for your help. Chris Fisher lui répond.
	Egyptian fractions		2008-07-09
		vivek pose la question : An Egyptian fraction has numerator equal to 1, and its denominator is a positive integer. What is the maximum number of different egyptian fractions such that their sum is equal to 1, and their denominator are equal to 10 or less? Janice Cotcher lui répond.
	Trigonometric equations		2008-07-09
		Carla pose la question : Hello, my problem is as follows: Solve the given equation for A, giving your answers in the interval from -180 to 180 4 sin A cos A + 1 = 2 (sin A + cosA) Harley Weston lui répond.
	A tangent line to a circle		2008-07-09
		Rita pose la question : The tangent to a circle may be defined as the line that intersects the circle in a single point, called the point of tangency. If the equation of the circle is x^2 + y^2 = r^2 and the equation of the tangent line is y = mx + b, show r^2(1 + m^2) = b^2 Harley Weston lui répond.
	A four sided lot		2008-07-09
		michelle pose la question : the front is 65.29 left side 162.26 the back 155.00 right side 101.01 right angle=50.00 left angle= 153.30 Harley Weston lui répond.
	Smallest Even Number		2008-07-09
		Ma. pose la question : Using the digits 0, 1, 3, 4, and 5 only once give the smallest 5-digit even number Janice Cotcher lui répond.
	Going from 45 mph to 35 mph		2008-07-09
		Terry pose la question : How long (distance - feet AND time) will it take a car traveling at 45 mph to slow down to a speed of 35 mph? Harley Weston lui répond.
	Making Change		2008-07-09
		Peter pose la question : In how many ways can you make 30 cents with quarters, nickels, and pennies? Penny lui répond.
	Hexadecagon		2008-07-09
		Dave pose la question : I would like to know at what length and angle I would cut wood to make a Hexadecagon. Penny Nom lui répond.
	A dog tied to a round building		2008-07-08
		maitham pose la question : i have this question which i don't know how to solve it : One dog was linked to the outer wall of a building round of 20 meters in diameter. If the length of chain linking the dog sufficient turnover of half the distance around the building, What area can guard dog? they said that we can solve it by integral .. can you solve it for me? Harley Weston lui répond.
	Profit as a percentage		2008-07-08
		ANNORIS pose la question : Question from annoris, a student: How to calculate percent of profits using step by step division formula. I know how to get the profit. Selling cost was $15.00 Cost amount was $10.00 Total profits its $ 5.00. But i do not know how to get the percent because i dont know how to divide to well . Can you helppppppp me ? Penny Nom lui répond.

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