Answer:
4 stations
Step-by-step explanation:
If we need to be at least 98% certain that an enemy plane flying over will be detected by at least one station, we must ensure that there is at most a 2% chance that no radar stations detect the plane.
The probability that a single radar station does not detect the plane is 0.35.
For n radar stations:

Rounding up to the next whole station, at least 4 stations are needed.
fir the x missing think is 11 and for the other f(×) is 24
In order to find the <u>common difference</u> of the data in the problem you have to follow those steps
we know that
In an <u>Arithmetic Sequence</u> the difference between one term and the next is a constant. This constant is called <u>common difference</u>
Let




so



therefore
the answer is
the common difference is 
Answer:
The question and choices are cut off, could you repost it?
Step-by-step explanation: