Asmall manufacturing firm has decided to expand production capacity by adding four machines: (1) a punch press, (2) a grinder, (3) a lathe, and (4) a welding machine. there are only four possible locations: a, b, c, and d. the welding machine will not fit in location b. the material handling costs of locating each of the machines in each of the possible locations are expressed in terms of dollars per hour (where m represents an arbitrarily large cost):

abcd are locations and 1234 are machines

a b c d
1 94 13 62 71
2 62 19 84 96
3 75 88 18 80
4 11 m 81 21

a. what is the optimal assignment of machines to locations?
b. what is the cost associated with the optimal assignment from part a?

An electronics manufacturer wants to know if customers would be interested in a detachable keyboard for their tables and if so, what the most important features would be. the manufacturer partners with an electronics store to include copies of the survey with every purchase at that store for one week. which of the following best explains why this random sample is unlikely to be a good representative sample of tablet owners' preferences for a detachable keyboard? a) one week is likely not enough time to get a large enough sample. b) most people won't bother to send in the survey, which is likely to skew the results c) there is no way to verify whether the responders to the survey actually own a tablet d) the survey is biased because it was conducted through an electronics store, not the general population

The anwser cause i do not understand just plez

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i