Lisa solves a quadratic equation as shown below. 6 = x2 + 2x - 8
6 = (x+4)(x-2)
6 = x + 4 and 6 = x-2
X = 2 and x = 8
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A The 6 should have been subtracted from both 6 and x2 + 2x - 8 before factoring.
B The last line should be x = 2 or x = 8.
Only (x + 4) or (x - 2) should be set equal to 6, not both factors.
D The 6, 2, and -8 should be simplified to 3,1, and
before factoring.

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to