Final answer:
Chris will spend $17.50 on rope.
Step-by-step explanation:
To find out how much Chris will spend on rope, we can first calculate the cost per inch of rope. Since 1.5 inches of rope costs $0.75, we can divide the cost by the length to find the cost per inch: $0.75 / 1.5 = $0.50 per inch.
Next, we can multiply the cost per inch by the total length of rope Chris needs. $0.50 (cost per inch) x 35 inches (length needed) = $17.50.
Therefore, Chris will spend $17.50 on rope.