They are at the same position at 0.5 seconds because with respect to the ocean's surface, they are both 9 feet away.
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Answer:
(b) √65
Step-by-step explanation:
The modulus of a complex number is the root of the sum of the squares of the real and imaginary parts.
|1 -8i| = √(1² +(-8)²) = √(1+64) = √65
