Question

in a scale drawing where 1 inch = 10 feet, how many inches represent 45 feet?
3.5
5.5
4.5
44
10

Explanation:

Step1: Set up proportion

Let $x$ be the number of inches. We have the proportion $\frac{1}{10}=\frac{x}{45}$.

Step2: Cross - multiply

$1\times45 = 10\times x$, so $45 = 10x$.

Step3: Solve for $x$

$x=\frac{45}{10}=4.5$.

Answer:

C. 4.5