How many times more intense is an earthquake that measures 7.5 on the richter scale than one that measures 6.7? (recall that the richter scale defines magnitude of an earthquake with the equation m=log i/s , where i is the intensity of the earthquake being measured, and s is the intensity of a standard earthquake

6.31 times ( approx )

Explanation:

Given formula to find the magnitude of an earthquake is,

Where,

I = intensity of the earthquake being measured,

S = the intensity of a standard earthquake,

By the above formula,

Since, S is constant,

If M = 7.5,

Then intensity of the earthquake,

If M = 6.7,

Then intensity of the earthquake,

Hence, the earthquake that measures 7.5 on the Richter scale is 6.3 times more intense than the earthquake that measures 6.7.

the answer would be c

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