Answer:
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Answer:
Option c.
Step-by-step explanation:
Confidence interval refers to an interval such that there is a probability that the value of a parameter lies within that interval.
Therefore, 
the confidence interval of the mean means that there is a probability that the value of a parameter lies within that confidence interval.
So, option c. is correct
Answer:
AT=6, RC=5
Step-by-step explanation:
Perpendicular bisector intersect at T that is the circumcenter.
since RT is a bisector or AC and AR=5 then RC=5
Circumcenter is equidistant from the vercices of the triangle so
AT≅BT≅CT
but CT is given to be CT=6 so AT=6
You could just use a calculator. Or, simply find the largest perfect square that is a factor of the number and then put the multiplier under a radical sign.
