Step 1:
Concept:
The cost of wire varies directly to the length in inches
Step 2:
[tex]\begin{gathered} \text{If 21 inches cot \$0.84} \\ \text{Then 1 inches will cost = }\frac{0.84}{21}\text{ = 0.04 \$/inch} \end{gathered}[/tex]
Final answer
14 inches will cost = 14 x 0.04 = $0.56 = 56 cents
56 cents
