Answer:
By the definition of midpoints, AX and CX are congruent. By the definition of segment bisectors, X is the midpoint of BD, and therefore BX and DX are congruent. Since angle AXD and CXB are vertical angles, they are congruent by the vertical angles theorem. By SAS, triangles AXD and CXB are congruent. By CPCTC, angles A and C are congruent. By converse of alternate interior angles theorem, AD is parallel to CB.
The exponential function is given by 
<h3>
exponential function</h3>
An exponential function is in the form:

Where a is the initial value of y and b is the multiplier factor
Let y represent the population after t years.
Given an initial population of 210000, hence:
The population increases by 12.5% each year, hence:
- b = 100% + 12.5% = 112.5% = 1.125
The exponential function is given by 
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None because the triangles have different lines