Complete Question:
A local area network is:
Answer:
b. a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange information such as a set of rooms, a single building, or a set of well-connected buildings.
Explanation:
A local area network (LAN) refers to a group of personal computers (PCs) or terminals that are located within the same general area and connected by a common network cable (communication circuit), so that they can exchange information from one node of the network to another. A local area network (LAN) is typically used in small or limited areas such as a set of rooms, a single building, school, hospital, or a set of well-connected buildings.
Generally, some of the network devices or equipments used in a local area network (LAN) are an access point, personal computers, a switch, a router, printer, etc.
Answer:
Structured Documents
Explanation:
Structured Documents consist of hierarchy in the files. They may include data files. HTML (Hyper-text markup language) documents and XML (Extensible Markup Language) applications are the examples of Structured Documents.
Answer:
Explanation:
Given
Power at point A = 100W
Power at point B = 90W
Required
Determine the attenuation in decibels
Attenuation is calculated using the following formula
Where 
t and 
t
Substitute these values in the given formula
<em>(Approximated)</em>
For example when there is research on how many people shoplift in a shopping centre per week. These numbers could show a increase in the number of shoplifters per week.
