Answer:
three half-lives
Explanation:
Converting 12.5% to decimal gives 0.125
If one half life is 0.5.
0.5*0.5*0.5 gives 0.125
Thus 3-half lives has been elapsed
<span>Well, I'm pretty sure there are four. The northern and southern hemispheres, and then the eastern and western hemispheres.</span>
Answer:
Tropical cyclones are like giant engines that use warm, moist air as fuel. That is why they form only over warm ocean waters near the equator. The warm, moist air over the ocean rises upward from near the surface. Because this air moves up and away from the surface, there is less air left near the surface.
Explanation:
Answer:
A Mercator map projection greatly distorts the area of land masses near the poles.
Explanation:
Mercator projection is a projection method where the meridians are deposited vertically on the parallel circles, and where the distance along these circles is gradually stretched more in relation to the terrain it gets closer to the pole. The method is common, for example on world and sea maps. It maintains directions correctly.
The projection gets right at the equator but in theory never reaches the poles and it depends on the cylindrical projection. Gerhardus Mercator's projection became famous in the 16th century and has since been used on the seas.
It seems you need to move the decimal three times over, then you round the number. So the answer would be 5.5 x 10^3.
