Solve the equation for -2? ? x ? 2?.sec x = 1
A. - 
, 
B. -2?, 0, 2?
C. -?, ?
D. none
Answer: B
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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 100 times that of the lesser earthquake.
B. The earthquake of greater magnitude has a seismographic reading that is 10 times that of the lesser earthquake.
C. The earthquake of greater magnitude has a seismographic reading that is 
times that of the lesser earthquake.
D. The earthquake of greater magnitude has a seismographic reading that is 
times that of the lesser earthquake.
Find the slope of the polar curve at the indicated point.r = 
, ? = 4?
A. 0 B. Undefined C. 4? D. -4?
Use multiplication to check the answer. If an answer is incorrect, find the correct answer.
A. Incorrect; should be 2367 R3 B. Correct C. Incorrect; should be 2368 R5 D. Incorrect; should be 2367 R4
Write the complex number in the form a + bi.6(cos 330° + i sin 330°)
A. -3
- 3i
B. 3
- 3i
C. 3
+ 3i
D. -3
+ 3i