HW1Solution

# HW1Solution - Homework 1 Grading Key Prof Milos Prvulovic...

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We can sell a new chip for \$26.52 (twice as much as before), profiting \$21.86 per chip. [All or nothing, profit should be computed using numbers from parts c (old selling price) and b (cost of new chip)] e) [5 points] We made a profit of \$1,895,000 per month [1 point] (500,000 times the per-chip profit) with old chips, and with new chips we will profit \$32,790,000 per month [1 point] (1,500,000 times per-chip profit), so the increase in monthly profit is \$30,895,000 [2 points]. The facility cost us \$1,000,000,000, so we need 32.37 months [1 point] (almost 3 years) to recoup the cost of the new facility. [Note: Should use profits computed in parts c and d] [-2: for not considering difference of old profit and new profit to calculate the recoup time, i.e. students used: recoup time = investment/(new chip price x new chip sales)] [-2: considering old profit to calculate recoup time (students used: recoup time = investment/(old chip price x old chip sales). NOTE: all students who didn't consider new profit, they naturally didn't consider profit-difference, so they lost -4)] 2. Hennessy and Patterson textbook, Exercise 1.13 (page 62). [30 points] a) [5 points] The table does not give execution times, it gives “performance” relative to some (slow) reference machine, so we cannot compute weighted execution times easily.
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