What is the measure of angle ABC?

42.5°
67.5°
85°
135°

A16 ounce bottle of orange juice says it contains 200 milligrams of vitamin c which is 250% uh just read the paper it explains it better

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?