Answer the question.Choose the expression that is equivalent to the following: 9(
)
A. 9 + 
B. 9
C. 
D. 
Answer: C
Mathematics
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Solve the problem.The half-life of plutonium-234 is 9 hours. If 20 milligrams is present now, how much will be present in 2 days? (Round your answer to three decimal places.)
A. 13.819 B. 0.496 C. 17.145 D. 4.286
Mathematics
Add or subtract.
- 
A. - 
B. - 
C. 
D. 
Mathematics
Simplify the decimal expression.4.13(6)
A. 24 B. 10 C. 10.13 D. 24.78
Mathematics
Find all numbers for which the rational expression is not defined.
A. None B. c = -9 C. c = 9 D. c = 0
Mathematics