What must be true about the width of joel’s compass opening before he draws the arc

The choices can be found elsewhere and as follows:

It must be the same as it was when constructing the arc above P.
It must be wider than it was when constructing the arc above P.
It must be narrower than it was when constructing the arc above P.

I think the correct answer is the first option, It must be the same as it was when constructing the arc above P. The intersections of the arcs above  and below the line are joined to produce the perpendicular bisector.

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

The answer is c. undefined terms