Answer:
A. a clear central message.
When creating a presentation on basically anything, there should always be a clear central message. The purpose of most presentations are to give information on what the presenter would like to convey to the audience members. Without a clear central message, the audience members would be lost and the presentations purpose will not be fulfilled.
Answer:
Dennis Ritchie
C was originally developed at Bell Labs by Dennis Ritchie between 1972 and 1973 to make utilities running on Unix
Answer:
The 172 accounted for 17-percent of the active fleet and flew 16-percent of the hours flown while accounting for six-percent of the fatal accidents.
Explanation:
In a two-year period there was but one fatal 172 accident that was due to a mechanical failure. That was an engine failure related to a valve. There were no fatal accidents related to fuel exhaustion or starvation.
Despite the good record in that area, the 172 is probably involved in just as many forced landings as any like airplane. It just appears more adaptable to impromptu arrivals than some other airplanes. The low landing speed contributes to this. There is no available statistic on this, but I would bet that most 172 forced landings don’t result in what the NTSB classifies as an accident.
I looked at fatal 172 accidents that occurred during two more recent years (2012 and 2013) when virtually all the NTSB reports were final as opposed to preliminary. There were 25 such accidents in the 48 contiguous states. If the methodology I used years ago is applied to that number, the 172 safety record appears to have improved, maybe substantially.
