Solve the problem.A certain radioactive isotope decays at a rate of 0.1% annually. Determine the half-life of this isotope, to the nearest year.
A. 7 years
B. 500 years
C. 693 years
D. 301 years
Answer: C
Mathematics
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Use De Morgan's laws to write a negation of the statement.Roger or Emil will attend the game.
A. Roger will not attend the game and Emil will not attend the game. B. Roger or Emil will not attend the game. C. Roger and Emil will attend the game. D. Roger will not attend the game and Emil will attend the game.
Mathematics
Perform the operation indicated. Simplify.
- 
A. 
B. 
C. 
D. 
Mathematics
Find the vertices of the hyperbola.
- 
= 1
A. (-6, 0), (6, 0) B. (-4, 0), (4, 0) C. (0, 6), (0, -6) D. (0, 4), (0, -4)
Mathematics
Use the summation properties to evaluate the series. The following rules may be needed: 
.
A. 685 B. 1125 C. 465 D. 915
Mathematics