Question

1. a photograph measuring 4 inches wide, and 5 inches long is enlarged to make a wall mural. if the mural is 12 inches wide, how long is the mural?

Explanation:

Step1: Determine the scale factor

The original width is 4 inches, and the new width is 12 inches. The scale factor \( k \) is calculated by dividing the new width by the original width: \( k=\frac{12}{4} = 3 \).

Step2: Calculate the new length

The original length is 5 inches. To find the new length, multiply the original length by the scale factor: \( \text{New Length}=5\times3 = 15 \) inches.

Answer:

The length of the mural is 15 inches.