H= -1/43
4h+12=11-39h
4h+39= -12+11 or 11-12
43h= -1
h= -1/43
Answer:

Step-by-step explanation:
Given


Required
Determine the circumradius, R
The circumradius is calculated as follows;

Substitute the values of AB, BC and AC

Evaluate the denominator


Take square root of 230400

<em>(Approximated)</em>
<em>Hence, the circumradius is 9.63</em>
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B is the answer.............