If it takes one minute per cut, how long will it take in minutes to cut a 20-foot-long timber in 20 pieces?

If 20% of a number is 35, what is 50% of that number?

Is the square root of 4 plus the square root of 16 rational?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.