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.Find the magnitude (to one decimal place) of an earthquake whose seismographic reading is 2000 millimeters at a distance of 100 kilometers from its epicenter. Round the answer to the nearest tenth.
A. 5.9
B. 7.3
C. 6.3
D. 6.4
Answer: C
Mathematics
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Solve the problem.The sum of the measures of the angles in any triangle is 180 degrees. In triangle ABC, angles A and B have the same measure, while angle C is 102 degrees larger than each of the other two angles. Find the measure of angle C.
A. 154 degrees B. 26 degrees C. 52 degrees D. 128 degrees
Mathematics
Write the vector v in the form ai + bj, given its magnitude 
and the angle ? it makes with the positive x-axis.
= 7, ? = 270°
A. v = -7i + 7j) B. v = -7i - 7j C. v = -7i D. v = -7j
Mathematics
Find the indicated term of the geometric sequence.6th term of 1, 
, 
, ...
A. a6 = 
B. a6 = 
C. a6 = 
D. a6 = 
Mathematics
Determine whether the given point is a solution of the equation.x + y = 10; (5, 7)
A. No B. Yes
Mathematics