- Math Question - Please help/explain?

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Where can I find average monthly daylight for US cities preferably in minutes/hours? Again, please help. Find all possible x such that x^4+2x^3+8x+9=0(mod 35).? What is the physics of electricity? What's the lowest temperature sugarcane can tolerate in Louisiana? Please help!
The pedestrian deaths is randomly selected, find the probability that the pedestrian was not intoxicated but the driver was.?