2. Fifteen successive heats of a steel alloy are tested for hardness. The resulting data are shown in Table
6E.21. Set up a control chart for the moving range
and a control chart for individual hardness measure-
ments. Is it reasonable to assume that hardness is
normally distributed?​

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.