If 5 pens cost £4 what is the cost of 1 pen

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

Hurry which expression is equivalent to 3√x^5y?

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me