Solve the problem. Use a calculator with an LN or a LOG key.An earthquake was recorded with an intensity which was 
times more powerful than a reference level earthquake, or 
What is the magnitude of this earthquake on the Richter scale (rounded to the nearest tenth)? The magnitude on the Richter scale of an earthquake of intensity I is 
A. 3.7
B. 4.7
C. 0.5
D. 10.8
Answer: B
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Find the probability.An IRS auditor randomly selects 3 tax returns (without replacement) from 47 returns of which 11 contain errors. What is the probability that she selects none of those containing errors?
A. 0.0102 B. 0.4403 C. 0.4494 D. 0.0128
Solve the problem.It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 50 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
A. 20 L B. 16.7 L C. 25 L D. 12.5 L
Complete the table for the equation.y = - 
x + 4
A. 
B. 
C. 
D. 
Factor the trinomial completely. If the polynomial cannot be factored, write "prime."z2 + 4z + 4
A. (z + 4)(z - 4) B. (z + 2)2 C. (z + 2)(z - 2) D. (z - 2)2