What is the circumference of a circle with a radius of 19 centimeters

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?