At 10 Meters,a Signal Has a Strength of 100 MW

question 47

Multiple Choice

At 10 meters,a signal has a strength of 100 mW.About how strong will it be at 40 meters?

• A)about 0.5 mW
• B)about 5 mW
• C)about 25 mW
• D)about 6 mW

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