Amanufacturer produces piston rings for an automobile engine. it is known that ring diameter is normally distributed with millimeters. a random sample of 15 rings has a mean diameter of . construct a 99% two-sided confidence interval on the true mean piston diameter and a 95% lower confidence bound on the true mean piston diameter.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

One positive number is 9 more than twice another. if their product is 95, find the numbers

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.