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Many hydroelectric systems utilise a backup reservoir in times of high demand. Filling a back up reservior requires more energy than can be obtained from its use. Calculate the power required (in MW) to pump water into a backup reservoir 25 metres above the water level, if the pumps operate at a flow rate of 15,000 litres per second and the pipe friction reduces the efficiency of pumping by 18%. (g=9.81 m.s-2 and the density of water is 1000 kg.m-3)
a bicylclist races on a bicycle with 14-inch0radiuswheels. when she is traveling at a speed of 45 ft/sec, how many revolutioins per minute are her wheels making?
Find the measures of angles x and y so that the top of the table will be parallel to the ground.
Use the graph of f(x)=x^2 to match the function to its corresponding graph. In words describe transformation that occurs (ex: The graph of f(x) is shifted 6 units to the left).
Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sport-utility vehicle. The extended warranty covered defects occurring after the initial three-year warranty expired.
Write the two equations in slope-intercept form, and then determine how many solutions the system has.
Evaluate the name of each pet's owner, the name and animal type of each pet, the street each owner lives on and the number of days that Larry needs to care for the animals for each owner
Last week, Tom drove 284 miles. This week, he drove miles. Using , write an expression for the total number of miles he drove in the two weeks.
Peanuts cost $4.00 per pound and cashews cost $7.50 per pound. If I buy a 5 lb bag consisting of Peanuts and Cashews, and I pay $23.50 for the bag, how many pounds of cashews and how many pounds of peanuts are in the bag?
Provide basic information about the BMI difference
The combined math and verbal SAT scores for female college students are normally distributed with a mean of 998 and a standard deviation of 200.
If the train were announced to be running thirteen minutes late, how many times would you predict the man next to you would check the time?
Find an equation for the trend line using the method of least squares.
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