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"Three single-phase step-up transformers rated at 10MVA, 4.6kV/13.8kV are connected in Wye-Delta configuration. The three transformers are used to feed a 20MVA load at 0.9 p.f. With an efficiency of 96%. Using per unit system, calculate: a. the secondary line voltage. b. the primary and secondary line currents when supplying this load. "

Classify the group   as a finitely generated abelian group.

Find a value of the standard normal random variable z, call it z0, such that P (z ≤ z0) = 0.025

Simplify the radicals using the given indication operations.Perform the indicated operations and simplify.

"A three-phase transmission line is 200 km long.  It has a total series impedance of ( 25 + j110) Ω per phase and a total shunt admittance of  .  It delivers 180 MW at 275 kV and 0.8 power factor lagging to a load connected at the receiving end. Using the medium model of the...

"1. Find the slope of the line that passes through the points (–3, –6) and (1, 6). 2. Find the slope of the line determined by the equation 6x –3y = 18. 3. Find the equation of the line perpendicular to the line x = 4 and passing through the point (4, 2). 4. Which one of the following equations represents the y-axis? "

A jar contains 5 red jelly beans, 9 yellow jelly beans, and 16 orange jelly beans. Suppose that each jelly bean has an equal chance of being picked from the jar. If two jelly beans are selected at random from the jar, what is the probability that neither is yellow? Show work.

"A sample of 10 urgent and non-urgent patients was conducted to determine average wait time.  The hospital wants to be sure that urgent patients do not wait as long as non-urgent patients.  The following hypotheses have been formulated: H0: the waiting times of urgent patient are equal...

Using an appropriate statistical test determine if there is a significant association between gender and satisfaction with the new initiative.

We have looked at break-even calculations, scatter plots for estimating demand information, and trends in revenue so far. In each of these, we simplified the analysis to a straight line. While this is useful, sometimes these data are more complex. They may be a curved line, or instead of only one...

"A consulting firm submitted a bid for a large research project. The firm’s management initially felt they had a 50/50 chance of getting the project. However, the agency to which the bid was submitted subsequently requested additional information on the bid. Past experience indicates that...

According to Best buy, 2/3 citizens have iPods. In a randomly selected group of 3 iPod owners, what is the probability that all 3 would have iPods from best buy? Or at least one would have iPod from best buy?

What is infection? How is it related to or different than inflammation?

The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches. A sample of four metal sheets is randomly selected from a batch. What is the probability that the average length of a sheet is between 30.25 and 30.35 inches long?