A runner competed in a 5-mile run. How many yards did she run? Conversion Factors:
1 km = 0.6214 miles
1 km = 3280.84 ft.
3 ft = 1 yard

It has to be b i hope this

The teacher is mostly talking about the distillation of a mixture

The correct answer is b) false

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).