Solve the problem.Use the formula R = log
, where the magnitude of an earthquake on the Richter scale is based on I, the measurement of a seismic wave, and I0, the measurement of a seismic wave of a level zero earthquake with the same epicenter. An earthquake was recorded which was 2,511,886 times more powerful than a reference level zero earthquake. What is the magnitude of this earthquake? (Round to the nearest tenth.)
A. 5.4
B. 6.4
C. 0.6
D. 14.7
Answer: B
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Solve the problem by integration.The current i (in A) as a function of the time t (in s) in a certain electric circuit is given by 
Find the total charge that passes a given point in the circuit during the first three seconds.
A. 3.664 C B. 11.067 C C. 1.230 C D. 3.689 C
Illustrate and find the product by the indicated method.Use repeated addition on your calculator to find 7679 × 5.
A. 7679 × 5 = 5 × 7679 = 7679 × 7679 × 7679 × 7679 × 7679 = 38,395 B. 7679 × 5 = 5 × 7679 = 7679 + 7679 + 7679 + 7679 + 7679 = 38,395
Provide an appropriate response.What is the perpendicular bisector of the segment between A = (-8, -6) and B = (-7, -6)?
A. y = - 
B. x = - 
C. y = -6
D. x = -6
In a parallel circuit, GT = 5 mS and V = 20 V. Find IT.
a. 100 mA b. 4 mA c. 100 mA d. 25 mA