Question

Plz solve this problem
Best answerer will be brainaliest

Answer 1

here
anglePOA=ANGLE COP
ANGLE COR=ANGLE BOR
BY LINEAR PAIR AXIOM
AOP+COP+COR+BOR=180
2(POC+COR)=180
POC+COR=90
POR=90

Answer 2

Step-by-step explanation:

Pure calcium carbonate can be produced from marble, or it can be prepared by passing carbon dioxide into a solution of calcium hydroxide. In the later case calcium carbonate is derived from the mixture, forming a grade of product called "precipitated calcium carbonate,” or PCC.