Determine approximate number of items manufactured
Suppose total revenue from sale of x items is provided by R(x)=29 ln(7x+1), while total cost to produce x items is C(x)=x/4. Determine approximate number of items which should be manufactured so that profit is maximum.
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The average time to enter the 35 order forms is 12.24 minutes, and population standard deviation is 4.9 minutes with normal distribution. The test question is: Should a merit raise be given? What is your conclusion? (Round your answer(s) to 3 deci
Using principle of conservation of mechanical energy, determine speed of 1.65-kg ball just before impact. Suppose that collision is elastic, determine velocities (magnitude and direction) of both balls just after collision.
Carry out the appropriate test for the county analyst at the 0.05 level. Calculate the test statistic and write your conclusion. (Round your answer(s) to 3 decimal places.)
Assume that the joint pmf of X and Y is f(x,y) = 1 / (4L2) for 0 ? x ? 2L and 0 ? y ? 2L. Determine the expected area of the resulting rectangle. Find the covariance of X and Y
The fraction X of male runners and the fraction Y of female runners who compete in marathon races are stated by the joint density function f(x,y) = 8xy for 0 ? y ? x ? 1. Find the covariance of X and Y
Each front tire on a hybrid is assumed to be filled to the pressure of 26 psi. Assume the actual air pressure in each tire is the random variable: X for the right tire and Y for left tire with the joint pdf. f(x,y) = k(x2 + y2) for 20 ? x ? 30 and
Civil engineers responsible for the design as well as maintenance of aircraft pavements traditionally use pavement-quality concrete. A study was conducted to access the suitability of concrete blocks as a surface for aircraft pavements.
Costs until shutdown are part of mine's operating costs. Maintenance costs start in twenty years at $200,000 annually. How much should be deposited now if fund will earn 6% interest? Suppose maintenance costs do not change.
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