Round Your Answer to Two Decimal Places $D$ From the Source $5 \mathrm { ft }$

question 48

Multiple Choice

Round your answer to two decimal places.
-The intensity I of light varies inversely as the square of the distance $D$ from the source. If the intensity of illumination on a screen $5 \mathrm { ft }$ from a light is 3 foot candles, find the intensity on a screen $15 \mathrm { ft }$ from the light.

• A) \(\frac { 1 } { 4 }\) foot-candle
• B) 2 foot-candles
• C) \(\frac { 1 } { 3 }\) foot-candle
• D) \(1 \frac { 1 } { 3 }\) foot-candles

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Definitions:

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Equity securities that represent ownership in a company, giving holders voting rights and a share in the company's profits through dividends.