Which of the following are properties of the incenter of a triangle? choose all that apply.
a. the incenter is where all of the bisectors of the angles of the triangle meet.
b. the incenter of an obtuse triangle lies on the outside of the triangle.
c. the incenter is equidistant from each vertex of the triangle.
d. the incenter of a triangle is always inside it.

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z