Which of the following are heterogeneous mixtures (not homogeneous mixtures)?
check all that apply.
a. milk that is sold at the store
b. a cake mix
c. a smoothie
d. mixed nuts

The following are heterogeneous mixture: MILK THAT IS SOLD AT THE STORE, A CAKE MIX AND MIXED NUT.
An heterogeneous mixture is one which contained many parts which can be separated out.
A smoothie is an homogeneous mixture because the juice of different fruits that are use can not be separated out.

The answer is b because a,c,and d are opinons