A student used a yardstick to model displacement of a rock at a fault during an earthquake

ANd?

Explanation:

Next time you need to add more information.

So what's the main question here?

it should be -8.6 cm hope this out

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer