1. the presence of 7.4% (by weight) of the element ni in the earth's core is indicated by geophysical (seismic data). the mass of the earth is 5.97 x 1027g; the mass of the core is: 1.94 x 1027g; the mass of the mantle is: 4.02 x 1027g. a. the volume of the earth's crust is 1.02 x 1010km3; mean crustal density is 2.8g/cm3; and mean concentration of ni in the crust is 75 parts per million (ppm) by weight. how many grams of ni are in the earth's crust? explain, you.

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Yes what can i with

The highest point of a hill (or mountain) is a single point.
a single point can only be precisely marked with a dot. 
putting on a contour line is impossible  on a single point because the contour line is created after multiple points that have the same hight are marked, and after that, all of those points are connected with a line that creates a closed area. so the highest point, as said above, is a single point, there are no other points with the same height, so the only possible way for it to be marked is with a dot, and there is no possibility for a contour line.

Christoban colon. he discovered the new world of the americas