Find the sum.-5 + 9 + 0 + (-1)
A. 13
B. 5
C. 3
D. -15
Answer: C
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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.
Evaluate the expression using the given values.mc2; m = 2.4 × 10-4, c = 3 × 108
A. 21.6 B. 2.16 × 1012 C. 7.2 × 104 D. 2.16 × 1013
Factor the trinomial completely.3x5 + 6x4 - 45x3
A. 3x3(x2 + 2x - 15) B. x3(x + 5)(3x - 9) C. 3x3(x + 5)(x - 3) D. x3(3x + 15)(x - 3)
Evaluate the expression.Let x = 10, y = -2. Evaluate |14x|.
A. 20 B. -20 C. -140 D. 140