The whooping crane (Grus americana) is the tallest bird native to North America. It almost went extinct in the 1900s; in 1938, there were only 18 whooping cranes left in the wild. Since then, its population has increased. The number of whooping cranes (N) is related to the number of decades since 1938 (t) by the following expression: ln(N) = 2.85 + 0.039t. The exponential relationship can be written as N = nakt, where n, a, and k are constants. Determine the value of a.

The value  is  

Explanation:

From the question we are told that

   The  relationship between the number of whooping cranes and the number of decades is

  The  exponential relationship is  

Now from the given equation we have that

So comparing this equation obtained an the given  exponential relationship we have that

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

0.55x745.7j and a calculator