The answer is B
Because when you graph it in the calculator you get x=-136 and that goes to one to one function on the graph
Isolate the variable by dividing each side by factors that don't contain the variable. p=q/2r
Just divided 1.3/100 and it gives you 0.013
The angle of rotation for a regular polygon is 360/number of sides.Here, it is 360/20=18 degrees.