The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where xo = 10-3.What is the magnitude of an earthquake whose seismographic reading is 7.6 millimeters at a distance of 100 kilometers from its epicenter?
A. 0.38808
B. 3.8808
C. 2.0281
D. 0.20281
Answer: B
Mathematics
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Give the opposite and then the absolute value of the number.-24
A. -24, 24 B. 0, 24 C. 24, 24 D. -24, -24
Mathematics
Solve the problem.Evaluate 
at (x, y, z) = (3, 2, 0) for the function u(p, q, r) = epq cos(r); p = 
, 
A. 12
B. 
C. 0
D. 24
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Rewrite the series using summation notation. Use 1 as the lower limit of summation.- 
+ 
- 
+ . . . - 
A. 
B. 
C. 
D. 
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Factor the polynomial by substitution.8x4 + 18x2 + 9
A. (4x2 - 3)(2x2 - 3) B. (8x2 + 3)(x2 + 3) C. (4x2 + 3)(2x2 + 3) D. (4x2 + 1)(2x2 + 9)
Mathematics