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Practice problem

Area and Perimeter of Similar Figures

By Expii Solve
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Distance Killed the Radio Wave\text{Distance Killed the Radio Wave}

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Picture of a phone with speech bubbles to indicate messages being received in real-time

Cell phones use radio waves to communicate. The intensity of radiation reaching a person from a cell phone decreases with their square of the distance to the cell phone.

How many times more powerful is the radiation intensity at a distance equal to a palm's width, versus the radiation intensity at a distance equal to an arm's length?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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