Answer:
86600 mm
Step-by-step explanation:
The given number is 86625
The significant figures are numbers that are relaiable and contribute to the degree of accuracy of measurements
To round off the number 86625 to the nearest 3 significant figure, the last two numbers (2 and 5) will be changed to 0, but 1 will not be added to 6 because 2 is not up to 5.
Therefore, 86625 mm to 3 significant figure is 86600 mm