The magnitude, M, of an earthquake is defined to be mc021-1.jpg, where I is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and S is the intensity of a "standard" earthquake, which is barely detectable. Which equation represents the magnitude of an earthquake that is 10 times more intense than a standard earthquake?
answer
C
question
What is the solution of mc016-1.jpg?
answer
NOT C (15)
question
A Cepheid star is a type of variable star, which means its brightness is not constant. The relationship between the brightness of a Cepheid star and its period, or length of its pulse, is given by M = -2.78(log P) - 1.35, where M is the absolute magnitude, or brightness, of the star, and P is the number of days required for the star to complete one cycle. What is the absolute magnitude of a star that has a period of 45 days? Use a calculator. Round your answer to the nearest hundredth.
answer
A -5.95
question
Which equation is equivalent to log x 36 = 2
answer
B x2= 36
question
Which logarithmic equation is equivalent to 32 = 9?
answer
A
question
What is the value of log 43? Use the calculator. Round your answer to the nearest tenth.
answer
( B ) 1.6
question
What is the value of log 27 g
answer
( C ) 2/3
question
What is the value of log 6 1/36
answer
( B ) -2
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