Aman is flying in a hot-air balloon in a straight line while keeping it at a constant altitude. as he approaches a parking lot and notices that the angle of depression from his balloon to a friend's car is 36º. he flew directly over the car. a minute and a half later he has travelled 360 feet horizontally; he looks back to see his friend getting into the car and observes the angle of depression to be 37º. at that time, what is the distance between him and his friend

33: i think it’s b

scientific laws are the result of testing theories and proving them to be facts.

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bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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