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Grade 11 Exponents CCSS: HSF-LE.A.4
The intensity of a signal in a fiber optic cable is modeled by [math]I(d)=I_0⋅10^(−0.02d)[/math],
where d is distance in kilometers. Over what distance does the signal strength drop to 30% of its original intensity?
where d is distance in kilometers. Over what distance does the signal strength drop to 30% of its original intensity?
- 21.3 km
- 23.3 km
- 26.1 km
- 28.5 km
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