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If we calculate a speedup of 2 with 4 processors, and use of each processor costs S1 per hour, how much extra money are we

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If we calculate a speedup of 2 with 4 processors, and use of each processor costs S1 per hour, how much extra money are we paying to save a hour of computation time by using tour processors instead of one? Suppose the sequential part of a program accounts for 4% of the program's com-putation time. You are executing on a machine with n processors. How many processors would it take to double the speedup? Of course, your answer should be in terms of n

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