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in a company with 3000 employees, the monthly salaries are normally distributed. The mean salary is $2700, with a standard deviation of $400. About how many of the employees earn more than $2460 per month?
Two tracking stations are on the equator 173 miles apart. A weather balloon is located on a bearing of N 32°E from the western station and on a bearing of N 18°E from the eastern station. How far is the balloon from the western station? Round to t..
Suppose a retiree wants to buy an ordinary annuity that pays her $2,000 per month for 20 years. If the annuity earns interest at 3.5% interest compounded monthly, what is the present value of this annuity?
Determine the inverse Z-transform for the followings.
A ball rebounds one half the height from which it is dropped. The ball is dropped from a height of 160 feet and keeps bouncing. What is the total vertical distance the ball will travel from the moment it is dropped until it hits the floor for the ..
The probabilities that a person A and a person B will live an additional 15 years are 0.76 and 0.59 respectively. Assuming that their lifespans are independent, what is the probability that A or B will live an additional 15 years?
A particle is moving along the curve y= 2 sqrt{4 x + 4}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 2 units per second. Find the rate of change of the distance from the particle to the origin at this i..
A triangle is placed in a semicircle with a radius of 5yd. Find the area of the shaded region. Use the value for 3.14 , and do not round your answer. Be sure to include the correct unit in your answer.
Determine the number of points in the sample space of the possible arrangements of boys and girls.
A toy maker finds that it costs C = 250 + 3.3xdollars to manufacture x toy trucks. If the budget allows $3,500 in costs, how many trucks can be made?
Find the cycle time in SECONDS because the tasks are in seconds and find the theoretical number of workstations
Find the average value of the function f(x) = cos^3x on the interval 0
Suppose there are 90 small towns in a country. From each town there is a direct bus route to at least 50 towns. Is it possible to go from one town to any other town by bus possibly changing from one bus and then taking another bus to another town?
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