What is the magnitude of the earthquakes

MAGNITUDE

2.5 to 5.4Often felt, but only causes minor damage =500,000

5.5 to 6.0Slight damage to buildings and other structures =350

6.1 to 6.9May cause a lot of damage in very populated areas =100

7.0 to 7.9Major earthquake. Serious damage =10-15

The Richter Scale

Explanation:

Earthquakes are measured on the Richter Scale. That's the best answer I can give your question kind of makes no sense.

reflecting point a across the origin negates both of its coordinates.

b = (5, -4)

answerformal;