Answer:
11.63 percentage of the earthquakes are minor earthquakes
Explanation:
Given:
The number of earthquakes that that occur annually = 421,140
The number of minor earthquakes that that occur annually = 49,000
To Find:
Percentage of minor earthquakes =?
Solution:
let the percentage of minor earthquake be x
then
x =
x =
x =
x= 11.63
The correct option is B.
The blood brain barrier is designed to prevent the passage of some substances such as drugs from the blood stream into the brain. The blood brain barrier is made up of high density cell barriers which restrict passage of substances into the brain area.