Answer:
It will cost $15.20
Step-by-step explanation:
A full pound of Swiss cheese consists of 4 quarters, then
1 quarter - $3.80,
4 quarters - $x.
Mathematically, you can write a proportion:
[tex]\dfrac{4}{1}=\dfrac{x}{3.80}\Rightarrow x\cdot 1=4\cdot 3.80,\ x=\$ 15.20.[/tex]