Seismologists use a method called to pinpoint the epicenter of an earthquake

Triangulation.

Explanation:

The epicenter is the point directly on the ground which is above the focus of an earthquake.

To determine the epicenter of an earthquake, seismologist use a method called triangulation.

The method of triangulation uses the distances an earthquake travels to a seismic station to pinpoint the epicenter. The distances are used as radius of a circle. Usually, three circles are drawn from the distances of the earthquake wave from the seismic stations. The point of intersection of the circles gives the epicenter of the wave.

the answer is b. apsidal precession

the value of the 4 in the hundreds place is 400 while the value of th e 4 in the tens place is 40

400 is way bigger than 40.