A boat crosses a river and lands downstream. If the still water of the boat is 35km/he and the current of the river is 9km/hr and the river is 1km wide, how far down the river would the boat make landfall to the opposite side

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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just took the test its not "d"