Answer: The lower bound for the area of the rectangle is 375.86 mm².
Step-by-step explanation: Calculation: The width of the rectangle is 19.4 mm. Since the width is measured to 1 decimal place, the actual width could be anywhere between 19.35 mm and 19.45 mm. Let’s assume the width is 19.35 mm. If the length of the rectangle is x mm, then the area of the rectangle is 19.35x mm².
Since we want to find the lower bound for the area, we need to assume the length is as small as possible. Therefore, we assume the length is 19.35 mm as well.
So, the lower bound for the area of the rectangle is 19.35 x 19.35 = 375.86 mm².
