Determine the number of significant digits in each of the following. If the information is exact, write exact.
a. The route between A and B is 8,025 meters long.
b. The average diver can swim about 15 meters per minute.
c. Air is 21% oxygen by volume.
d. 1 milliliter is equivalent to 0.001 liters
e. During strenuous exercise, the average person exhales about 1 liter of air per breath.
f. There are 175 divers.
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