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.What is the magnitude of an earthquake whose seismographic reading is 0.94 millimeters at a distance of 100 kilometers from its epicenter? Round the answer to four decimal places.
A. -0.0269
B. -3.0269
C. 2.9731
D. 0.9731
Answer: C
You might also like to view...
Solve the initial value problem.Differential Equation: 
= -3ti + 7tj + 9tkInitial Condition: r(0) = -3i + 3k
A. r(t) = 
i + 
t2j - 
k
B. r(t) = 
i + 
t2j + 
k
C. r(t) = (-3t2 - 6)i + 7t2j + (9t2 + 6)k
D. r(t) = 
i + 
t2j + 
k
Factor the trinomial completely.x3 + 4x2 - 32x
A. (x + 8)(x - 4) B. (x2 + 8)(x - 4) C. x(x2 + 4x - 32) D. x(x + 8)(x - 4)
Solve the problem.A triangular piece of glass is being cut so that the height of the triangle is 4 inches shorter than twice the base. If the area of the triangle is 224 square inches, how long is the height of the triangle?
A. 30 in. B. 32 in. C. 16 in. D. 28 in.
Provide an appropriate response.Solve the following system of equations using the addition method: 3x - 2y = 6 x + 3y = 2
Fill in the blank(s) with the appropriate word(s).