Question

Suppose that 13 inches of wire costs 52 cents. At the same rate, how much (in cents) will 34 inches of wire cost.

Answer 1

Find price per inch:

0.52 / 13 = 0.04 per inch.

Multiply cost per inch by inches:

0.04 x 34 = 1.36

It will cost $1.36 for 34 inches.