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West Nile Virus
You are the director of communicable diseases in a city health department, responsible for a large urban community. It is early spring in 2003. For the past two years, your department has been working to control the spread of the West Nile Virus and you are pleased with the progress so far. This morning you read about a suspected outbreak of a new disease called SARS which is suspected to have killed dozens of people in Hong Kong. While West Nile Virus is carried by birds, especially crows, SARS is transmitted among people.
When you get to the office and check your email you learn that the World Health Organization has placed a number of East Asian cities off limits for all but essential travel. You also learn that Canada has reported deaths they believe are due to SARS. You are now confronted with addressing a new and virulent contagious disease.
Permutation and combination to find number of ways
Three hundred people apply for three jobs. 100 of the applicants are women.
The life span of a battery is normally distributed, with a mean of 2400 hours and a standard deviation of 50 hours. What persent of batteries have a life span that is more than 2455 hours?
A mini license plate for a toy car must consist of three numbers followed by a letter. Each number must be a 3,6, or 9. Repetition of digits is NOT permitted. Each letter must be an A, B, or C.
A hemisphere of radius 5 sits on a horizontal plane. A cylinder stands with its axis vertical, the center of its base at the center of the sphere, and its top circular rim touching the hemisphere. Find the radius and height of the cylinder of maxi..
A 17 ft ladder leans against a wall. The bottom of the ladder is 4 ft from the wall at time t=0 and slides away from the wall at a rate of 1 textrm{ft/sec}.
a triangular lot has dimensions 20.6 m, 31.4 m and 38.3 m. Find the angles at the corners of the property.
"Find all times t in the open interval 0
Formulate a Linear Program (LP) that can be used to maximize the revenue. Solve the LP graphically.
Factor the polynomial by grouping. 4y2 + 12y + 5 =
A baseball diamond is a square 90 feet on a side. A player is running from second base to third base at the rate of 15 feet per second. Find the rate of change of the distance from the player to home plate at the instant the player is 10 feet from..
Suppose that a student has 500 vocabulary words to learn. If the student learns 15 words after 5 minutes (this means L(5)=15 for the function L(t) ) , the function L(t ) = 500(1- e-0.0061t ) approximates the number of words L that a student will le..
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