Every Monday, a company randomly selects 4 items from its pr…

Every Monday, a company randomly selects 4 items from its production line and measures the diameter of each item. This following table shows the data during last month (unit: inches). Week 1 Week 2 Week 3 Week 4 1 17.2 17.2 17.1 16.9 2 17.0 17.1 16.9 17.0 3 17.1 16.8 17.2 17.1 4 17.0 16.9 17.2 17.2 Suppose the process has a known mean and known standard deviation. After constructing the 3-sigma control limits of the mean chart, the company gets that UCL = 17.28 and LCL = 16.84. Which of the following statements is true?  

A man parks his car in a public park’s packing lot, then wal…

A man parks his car in a public park’s packing lot, then walks 1.5 mile to the east, 2.0 mile {a}° north of east, and then 0.2 mile to the north to find his friends who are having a picnic party.  How far has the man walked in the north direction? Express your answer in miles with two significant figures.  Please enter unit in the form of “mile”.