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In a study of 420,095 cell phones users in Denmark, it was found that 135 developed cancer of the brain or nervous system. Estimate the probability that a randomly selected cell phone users will develop such a cancer. Is the result very different from the probability of 0.000340 that was found for the general population? What does the result suggest about cell phones as a cause of such cancer, as has been claimed?
The velocity of a car after t seconds is 2t feet per second. (a) How far does the car travel during its first 10 seconds? (b) How many seconds does it take the car to travel half the distance in part (a)?
Let A, B and C be subsets of a universal set U and suppose n(U) = 100, n(A) = 30, n(B) = 30, n(C) = 32, n(A ∩ B) = 9, n(A ∩ C) = 10, n(B ∩ C) = 14 and n (A ∩ B ∩ C) = 5.
A ball is thrown vertically upward. After t seconds, its height h (in feet) is given by the function h(t)=88t-16t^2. What is the maximum height that the ball will reach?
An insurance company claims that for x thousand policies, its monthly revenue in dollars is given by R(x)=150x and its monthly cost in dollars is given by c(x)=120x+7200.
The sum of sallys age plues twice tomas' age is 12. the difference of sallys age and tomas' age is 3. write and solve a system of equations to find their ages.
altitude CD intersects AB at D. If AD=3 and DB=4, find the length of CD in simplest radical form.How do I go about figuring out this problem?
2 mechanics worked on a car. The first mechanic worked for 10 hours and the second mechanic worked for 15 hours. Together they charged a total of 1850 . What was the rate charged per hour by each mechanic if the sum of the 2 rates was 145 per hour..
Suppose that you flip a coin 10 times. What is the probability that you achieve at least 6 tails?
Find the circumference of a circle
The probability that a teenage driver will speed is 0.8; for a twenty-something driver, the probability of speeding is 0.5; for a mature driver
The graph on V in which two such sequences form an edge if and only if they differ in exactly one position is called the d-dimensional cube. Let G be a graph containing a cycle C, and assume that G contains a path of length at least k between two ver..
Calculate monthly deposits necessary to accumulate $13,800 after 5 years in account earning 6.75% compounded monthly?
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