Evaluate or simplify the given expression.cos-1 
A. 
B. - 
C. 
D. 
Answer: D
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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.Two earthquakes differ by 0.1 when measured on the Richter scale. How would the seismographic readings differ at a distance of 100 kilometers from the epicenter?
A. The earthquake of greater magnitude has a seismographic reading that is 
times that of the lesser earthquake.
B. The earthquake of greater magnitude has a seismographic reading that is 
times that of the lesser earthquake.
C. The earthquake of greater magnitude has a seismographic reading that is 100 times that of the lesser earthquake.
D. The earthquake of greater magnitude has a seismographic reading that is 10 times that of the lesser earthquake.
Simplify. Assume that variables can represent any real number.
A. 6
k3q4
B. 6
k2
q8
C. 6
k2
q4
D. 6k3q4 
Complete the following proof using the statements and reasons found below
Provide an appropriate response.Determine which of the following is used to solve the inequality ?ax + b? > c.
A. ax + b > c and ax + b < -c B. -c > ax + b > c C. ax + b > c or ax + b < -c D. ax + b > c or ax + b > -c