Answer:
Negative numbers are numbers that are less than 0. The opposite of a positive number is negative, and the opposite of a negative number is positive. Since the opposite of 0 is 0 (which is neither positive nor negative), then 0 = 0. The number 0 is the only number that is its own opposite.
Step-by-step explanation:
Step-by-step explanation:
I didn't understood thr question and I'm pretty sure that u made a mistake while writing it
Place values:
As each is in a different place value, when we add them neither will affect the other, meaning:

Answer: B 4.39
They are at the same position at 0.5 seconds because with respect to the ocean's surface, they are both 9 feet away.
Hope this helps!!