Question

this rectangle is a scaled copy. it was scaled by a scale factor of 1/2. suppose you want to scale it back to its original size. what scale factor should you use? 3in 10in

Explanation:

Step1: Recall scale - factor concept

If a figure is scaled by a factor $a$ and then we want to scale it back to the original size, we use the reciprocal of $a$.

Step2: Identify the given scale - factor

The given scale - factor is $\frac{1}{2}$.

Step3: Find the reciprocal

The reciprocal of $\frac{1}{2}$ is $2$.

Answer:

$2$