Answer:

Is the volume of this right rectangular prism.
Step-by-step explanation:
Rectangular prism volume formula is:-
Distribute proporty
a(b+c)=ab+ac
3=a
b=40
c=7
3(40+7)=3*40+3*7
You would find the answer by dividing --> 19.50/3.25 = 6 family members over 3 years old