Question

Suppose at 21 inches of wire cost $.84 at the same rate how much incense for 14 inches of wire cost

Answer 1

Step 1:

Concept:

The cost of wire varies directly to the length in inches

Step 2:

`\begin{gathered} \text{If 21 inches cot \$0.84} \\ \text{Then 1 inches will cost = }(0.84)/(21)\text{ = 0.04 \$/inch} \end{gathered}`

Final answer

14 inches will cost = 14 x 0.04 = $0.56 = 56 cents

56 cents