Arecipe used 2/3 cup of sugar for every 2 teaspoons of vanilla. how much sugar was used per teaspoon of vanilla?
a) 1/3
b) 1 1/3
c) 2 2/3
d) 3

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.