On the Richter scale, the magnitude R of an earthquake is given by the formula 
where I is the intensity of the earthquake being measured and I0 is the standard reference intensity.
?
Express the intensity I of an earthquake of magnitude 
in terms of the standard intensity I0.
?
Express the intensity I of an earthquake of magnitude 
in terms of the standard intensity I0.
?
How many times greater is the intensity of an earthquake of magnitude 8 than one of magnitude 6?
?
In modern times the greatest loss of life attributable to an earthquake occurred in eastern China in 1976. Known as the Tangshan earthquake, it registered 8.2 on the Richter scale. How does the intensity of this earthquake compare with the intensity of an earthquake of magnitude 
? Round your answer to the nearest integer.
?
A. 
; 
; 100; 153
B. 
; 
; 2; 143
C. 
; 
; 100; 168
D. 
; 
; 100; 158
Answer: D
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If a rock falls near the surface of Mars, it has a constant downward acceleration of 3.77 meters per second per second. If V is the downward velocity, in meters per second, of the rock after t seconds, then V satisfies which equation of change? ?
A. 
B. 
C. 
D. 
Add or subtract by first simplifying each radical and then combining any like radicals. Assume that all variables represent positive numbers.
+ 
+ 
+ 
A. 109
+ 21
B. 
+ 
+ 21
C. 13
+ 21
D. 13
+ 
+ 
Find the percent. Round to the nearest tenth of a percent.71.9 inches is what percent of 5 inches?
A. 0.7% B. 14,380% C. 7% D. 1438%
Compute.-?24?
A. - 
B. 24
C. 0
D. -24