Final answer:
The length of Q’U’ is the same as the length of QUAD, which is the width of the rectangle.
Step-by-step explanation:
To find the length of Q’U’, we need to understand how dilation works. In this case, the rectangle QUAD is dilated by a factor of 3, which means that every length in the original rectangle is multiplied by 3 to get the corresponding length in the dilated rectangle. Since the length of QUAD is unchanged, the length of Q’U’ is also unchanged. Therefore, the length of Q’U’ is the same as the length of QUAD, which is the width of the rectangle.