Solve the problem.The energy E (measured in joules) released by an earthquake of magnitude M on the Richter scale 
is given by the equation 
. Suppose an earthquake registers 8.1 on the Richter scale. Let I0 = 1. What is the intensity of the earthquake?
A. I = 1016.55
B. I = 16.5510
C. I = 108.1
D. I = 8.110
Answer: C
Mathematics
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Determine the quadratic function whose graph is given.
A. f(x) = -x2 + 4x B. f(x) = -x2 - 4x C. f(x) = x2 + 4x D. f(x) = x2 - 4x
Mathematics
Solve the problem.What is the domain of the function y =log8
?
A. [0, ?) B. (0, ?) C. (8, ?) D. (-?, ?)
Mathematics
Add or subtract as indicated. Express the answer as a single polynomial in standard form.(x2 + 1) - (4x2 + 7) + (x2 + x - 8)
A. -2x2 + x - 14 B. -2x2 + 8x - 7 C. -4x2 + x - 14 D. -3x2 + x - 14
Mathematics
Perform the indicated row operations on the following matrix. 
(-2)R1 + R2 ? R2
A. 
B. 
C. 
D. 
Mathematics