19/50 when you divide both the numerator and the denominator by 2.
See attached scatter plot
this does not show a linear pattern
The central angle of the hexagon is equal to 60º.
Therefore, the trigonometric relationship for the radius is given by:

Where,
a: apothema of the hexagon
c: Hexagon radius.
Clearing the radio we have:

Substituting values:

Rounding to the nearest whole number we have:

Answer:
The measure of the radius, c, rounded to the nearest inch is:
C. 14 in.
Ivan forgot to follow PEMDAS
Division first
12/3 = 4
4 x 2 = 8
8 + 8 = 16
Hope this helps!