Answer:
The intensity of the first earthquake is 6.31 times the second one
Step-by-step explanation:
The given formulae is M=log()
Here for both the earthquakes the value of S is same.
Let the Intensity of the first earthquake be I1 and the second be I2.
Given M1=7.5
M2=6.7
Now M1=log()------1
M2=log()-----2
Now subtract 1 and 2 we get
M1-M2=log()
I1/I2=
I1=I2(
I1=I2*6.31
Answer:
The money of Greg after five years is $80
The money of Sabrena after five years is $160,000
So,The money of Sabrena is more than Greg after five years .
Step-by-step explanation:
Given as :
Greg invested $20 and quadrupled his money in five years
Let the quadrupled money after five years = $x
∵ quadrupled means the money becomes 4 times of previous
So, x = $20 × 4
i.e x = $80
So, The money of Greg after five years is $80
Again
Sabrena invested $20 and after five years money becomes 20 to the fourth power
Let the money after 20 to the fourth power = $y
So, y =
i.e y = 160,000
So, The money of Sabrena after five years is $160,000
∵ Sabrena money is more than Greg money
Hence, The money of Sabrena is more after five years . Answer