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A company that has a two-year contract to haul ore from an open-pit mine to loading docks for shipping needs 200 additional trucks. Purchased trucks have a useful life of two years and a purchase cost of $140,000 each. The company can lease trucks for $80,000 per year (paid at the beginning of the year). Purchased trucks will be purchased only at the beginning of the two-year period and have no salvage value at the end of two years. The mining company has $8 million cash available to lease and/or buy trucks at the beginning of year 1. In addition, the company can obtain a loan each year for as mush as $20 million at 12% interest per year. The loan agreement requires that the company repay the borrowed amount plus interest at the end of each year. Each truck will earn $120,000 per year, which will become part of the cash flow of funds available to the company for truck leasing and loan repayment. The company wants to minimize the total cost of the trucks over the two-year period. Formulate a linear programming model for this problem. (Do not attempt to solve.)
Which approach toward data is more aligned with qualitative research?
The firm may use any combination of the inputs x and y so long as x + y = 100. Find the amount of x and y that should be used to minimize cost while satisfying the restriction that x + y = 100. In addition, what is the minimum cost and SP for the ..
Using the results from part (c) and the range rule of thumb, indentify the range of usual value.
Verify DeMorgan's Law, as presented in Section 1.1.2. Using DeMorgan's Law, give equivalent functions for the following: wx + xz + y'
Compare the force exerted on the toe and heel of a 120-lb woman when she is wearing regular shoes and stiletto heels. Assume all her weight is placed on one foot and the reactions occur at points A and B asshown.
Find the optimal strategy using each of the indicated pure strategies. Your values must be correct to within + or - 0.001 of the exact answers.
The life span is normally distributed with a standard deviation of 500 hours. The firm is considering a 3,800 hours' warranty on the circuit board. If this warranty policy is adopted, what proportion of circuit boards should the firm expect to rep..
If you were to change the confidence level to 95%, what would happen to the confidence interval?
1. A histogram for Gaussian "Normal" random variable X_1 with zero-mean and unit variance. Calculate its mean and variance. 2. Repeat 1 for a uniformly distributed random variable X_2 on the interval [-1,1]
Based on experience with the current coffee makers, your best guess for the population standard deviation, sigma, is 1.2 cups. How big of a sample do you need? Calculate the estimated sample size needed for the above scenario and communicate your ..
Problem 1: Compute the derivative function f'(x) algebraically.
A typical recommendation from an inferential test is to either not Reject the null implying no statistical difference in the means or to reject implying there is a statistical difference in the means.
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