the distance between Johannesburg and bloemfontein is estimated at 435km. if they travel at an average speed of 120km per hour, how long will it take them to travel from Johannesburg to bloemfontein? give answer in hours ,minutes and seconds​

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