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The standard deviation of monthly changes in the spot price of live cattle is (in cents per pound) 1.2. The standard deviation of monthly changes in the futures price of live cattle for the closest contract is 1.4. The correlation between the futures price changes and the spot price changes is 0.7. It is now October 15. A beef producer is committed to purchasing 200,000 pounds of live cattle on November 15. The producer wants to use the December live-cattle futures contracts to hedge its risk. Each contract is for the delivery of 40,000 pounds of cattle. What strategy should the beef producer follow?
An entrepreneurial new civil engineering graduate started a lab for testing endocrine disrupting compounds. The lab just broke even the first year, but in years 2 through 5, it made a profit of $97,000 each year.
two cohernt sources produce interference patern intensity ratio of bright fringe to dark fringe is 9/1. calculate the intensity ratio of sorces.
A 5-m wide rectangular open channel lined with rubble masonry (n=0.025) and laid on a slope of 0.0004. If the depth of flow is 3 m, what is the rate of discharge (m3/s)
Water flows through a pipe at 14cfs. At a point where the pipe diameter is 18in. the pressure is 30 psi; at a second point, further along the flow path and 2 ft lower than the first, the diameter is 9in. and the pressure is 18psi.
The centres of the piers in a bridge are 8.0m apart. The piers are each 0.8m wide. Water flow under the bridge with an upstream depth and velocity of 4.0m and 4.0m/s respectively. The pier has a drag coefficient Cd = 1.5.
An axial force of 200 kN is applied to the assembly by means of rigid end plates. Determine the normal stress in the aluminum shell.
A large steel tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 19,000N. Determine the minimum required wire diameter assuming a factor of safety 5
Calculate the the oritical oxygen demand (mg/L) of a solution containing 450 mg of glucose(C6H12O6) in 2 liters of distilled water.
A multiple-piston hydraulic jack has two output pistons, each with an area of 250 cm^2. The input piston, whose area is 25 cm^2, is concerned to a lever that has a mechanical advantage of 9:1.
a 25-mm diameter steel cylinder 300-mm long falls, because of its own weight, at a uniform rate of 0.1 m/s inside a tube of slightly larger diameter. A castor-oil film of constant thickness is between the cylinder and the tube.
The 50-lb block C rests on the uniform 20-lb bar AB. The cable connecting C to B passes over a pulley at D. Find the magnitude of the force acting between the block and the bar
Draw the influence line for the support reaction at A and calculate the support reaction at point
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