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Each employee of a certain company is in either Department X or Department Y, and there are more than twice as many employees in Department X as in Department Y. The average (arithmetic mean) salary is $25,000 for the employees in Department X and $35,000 for the employees in Department Y. Which of the following amounts could be the average salary for all of the employees of the company?
Indicate all such amounts.
An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 24 percent.
find whether x3 is a local maximum or a local minimum and sketch the graph.the function f has a derivative everywhere
Two balls of same mass are projected one vertically upwards and the other at angle 60o with the vertical. Find the ratio of their potential energy at the higest point.
A rectangular pot of ground measuring 12 meters by 20 meters is surrounded by a sidewalk of uniform width. The area of the sidewalk is 68 square meters. Find the width of the sidewalk.
a mathematics teacher collects old books. a student asked him how many books he had. he said if i divide the books into
Find n! For n equal to each of the first ten positive integers and use mathematical induction to prove that x - y is a factor of xn - yn, where x and y are variables.
3.Suppose thet g . odd, f°,g(x)d.3 = 2, wed g(3). = Either find f: g(g)dx, or show there is not enough informotion to .a g(3.1.3.Suppose that g is odd, R 4−2g(x) dx = 2, and R −4−6g(x) dx = 3. Either find R 62g(x) dx, or show there is notenough infor..
It is difficult to measure any residual radioactivity if N(t) drops below No/1000. But if this is the case, we can at least say that the living thing must have died at t years ago or more. Solve for t in the inequality: N(t) > No/1000.
Is empty set a symmetric relation? Prove or disprove.
At President Bush's inaugration in 2005,the newspaper headlines stated there were about 400,00 people in attendance. what is the largest number and smallest number of people that could have been there
How rapidly is the diameter of the balloon increasing when the diameter is 1.1 feet?
Write a short paper indicating which type of account you have chosen and why you chose that account.
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