6 times itself, multiplied by 5 times itself

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.

Bring the fraction a/a-4 to a denominator of 16-a^2

When 60% of a number is added to the number the result is 192 what is the bumber