Explanation:
Given parameters:
Distance of the seismic station from Blue mountain lake = 1200km
Unknown:
Time = ?
Solution:
To solve this problem, we must know that velocity is the displacement divide by time:
Velocity = 
Since we are looking for time, lets make it the subject of the expression;
Time taken = 
velocity of the wave is a consant = 6km/s
Time taken =
= 200s
Learn more:
Seismograph brainly.com/question/11292835
#learnwithBrainly
Meteorologists is someone who studies weather.
The correct answer is: [B]: "caused by the chemicals in a mineral" .
_________________________________________________________
The ashes and smoke after an eruption
What u said i don’t understand