Solve.An earthquake was recorded with an intensity which was 
times as powerful as a reference level earthquake, or 
What is the magnitude of this earthquake on the Richter scale? The magnitude of an earthquake of intensity I is defined as 
, where Io is a minimum level for comparison.
A. 3.9
B. 0.49
C. 4.9
D. 11.3
Answer: C
You might also like to view...
Find the missing value in the ordered pairs.8x + y = -38(-5, ), (0, ), (1, )
A. (-5, -42), (0, -38), (1, -46) B. (-5, 2), (0, -38), (1, -46) C. (-5, 2), (0, 38), (1, -46) D. (-5, -78), (0, -38), (1, -46)
Solve the logarithmic equation.log4(9x - 9) = 1
A. 
B. {4}
C. 
D. 
Find the period P, amplitude A, and phase shift S, and graph at least two periods of the equation.y = 6 sin (4x - 90°)
A. P = 60°, A = 4, S = -15°
B. P = 60°, A = 4, S = -15°
C. P = 90°, A = 6, S = -22.5°
D. P = 90°, A = 6, S = 22.5°
E. P = 90°, A = 6, S = -22.5°
Solve.A local animal shelter accepts abandoned cats and dogs. They usually receive twice as many cats as dogs. They estimate that 60% of the cats and 50% of the dogs that come in need some kind of medical treatment. If they treated 187 animals last year, how many cats and dogs did they take in?
A. 110 dogs, 112 cats B. 110 dogs, 220 cats C. 220 dogs, 440 cats D. 220 dogs, 110 cats