The rate of change is about 1 mm.
In order to subtract fractions, you need the denominators (bottom number) to be the same.

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Answer:
1,944 cubic m
Step-by-step explanation:
Answer: Yes, 4-6 is the same as 4 + (-6).
Step-by-step explanation:
One reason why they are the same is because 4 - 6 equals -2 and 4 + (-6) also equals -2. You can turn 4 - 6 into 4 + (-6) by turning the subtraction sign to a plus sign and turn the positive 6 into a negative 6.