The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where x0 = 10-3.What is the magnitude of an earthquake whose seismographic reading is 7.7 millimeters at a distance of 100 kilometers from its epicenter? Round the answer to the nearest tenth.
A. 2.7
B. 886.5
C. 3.9
D. 2.9
Answer: C
Mathematics
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Provide an appropriate response.The population of a town with an initial population of 52,576 is decreasing at a rate of 4% per year. Make a graph of the exponential function.
A. 
| Year |
B.
| Year |
C.
| Year |
D.
| Year |
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Evaluate f(x) at the given value of x.f(x) = 2x3
x = 5
A. 30 B. 1331 C. 127 D. 250
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Find the function value.f(x) = 
; f(3)
A. 
B. 
C. 
D. - 
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Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 
, w = 
A. 174.8° B. 95.2° C. 5.2° D. 84.8°
Mathematics