Perform the indicated operation. Assume that all variables represent nonnegative real numbers.3
+ 2
A. 35
B. 7
C. 7
D. 3
+ 2
Answer: B
Mathematics
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Evaluate the improper integral.
A. 196 B. 294 C. 245 D. 147
Mathematics
Solve the problem.A certain radioactive isotope decays at a rate of 0.275% annually. Determine the half-life of this isotope, to the nearest year.
A. 182 years B. 109 years C. 3 years D. 252 years
Mathematics
Solve.An earthquake was recorded with an intensity which was 
times more powerful than a reference level earthquake, or 
What is the magnitude of this earthquake on the Richter scale (rounded to the nearest tenth)? The magnitude of an earthquake of intensity I is defined as 
, where Io is a minimum level for comparison.
A. 3.9 B. 4.9 C. 0.5 D. 11.3
Mathematics
Integrate the function.
dx
A. 
tan-1 
+ 
+ C
B. sin-1 
+ 
+ C
C. sin-1 
+ 
ln (
) + C
D. 
+ C
Mathematics