Chapter 4.4, Problem 25E

To determine

(a)

To find:

The exponential model for $N$ as a function of $M$.

To determine

(b)

To find:

The number of earthquakes of magnitude at least $5.5$ that can be expected.

To determine

(c)

The number of earthquakes per year of magnitude $8.5$ or greater.

To determine

(d)

The limiting value for $N$ and explain what it means in practical terms.

To determine

(e)

To compare:

The number of earthquakes per year of magnitude $M$ or greater with the number of earthquakes of magnitude $M+1$ or greater.