During an earthquake, seismic waves move outward from the focus in all directions.

Compare the quantity in column a with the quantity in column b. pa p a is tangent to the circle at a. column a column b ap a p ax a x question 4 options: the two quantities are equal. the quantity in column a is greater. the relationship cannot be determined from the information given. the quantity in column b is greater.

All of the following occurred due to the invention of the railroad except

Irelanda. populationb. square mileagec. average population density per square mile