Michael is 3 times as old as brandon 18 years ago, michael was 9 times as old as brandon.

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

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?