Question

The seismic activity density of a region is the ratio of the number of earthquakes during a given time span to the land area affected. A state had 424 earthquakes over a given time span and a land area of 71,300 square miles. What is the seismic activity density for this state? Round to the nearest ten thousandth, if necessary.

Answer 1

Seismic activity density will be 0.0059

Step-by-step explanation:

We have number of earthquakes = 424

And area of the land 71300 square miles

We have to find the seismic activity density

It is given that seismic activity is the ratio of number of earthquakes to the affected land area

So seismic activity density
`=(424)/(71300)=0.0059`

So the seismic activity density 0.00059

Answer 2

0.0059

Step-by-step explanation:

According to the question the seismic activity density is given by

`\text{Seismic activity density}=\frac{\text{Number of Earthquakes over a given time span}}{\text{The land area affected}}`

Here,

Number of Earthquakes over a given time span = 424

The land area affected = 71300 mi²

So,

`\text{Seismic activity density}=(424)/(71300)\\\Rightarrow \text{Seismic activity density}=0.0059`

The seismic activity density is 0.0059