Can someone help me out asap tap on the picture

Explanation:

In the figure, two secants that intersect outside a circle form an angle with measure of xº and the measures of the arcs formed are 136º and 28º.

When two secants intersect outside a circle, the measure of the angle formed is one-half the absolute difference of the measures of the intercepted arcs.

Then, you can write and solve this equation:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

a corroding iron, if that's one of your choices