Solve.The half-life of silicon-32 is 710 years. If 80 grams is present now, how much will be present in 200 years? (Round your answer to three decimal places.)
A. 78.453
B. 11.353
C. 65.81
D. 0
Answer: C
Mathematics
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Fill in the blanks.142 = 
so 
= 14.
A. 14, 196 B. 196, 14 C. 196, 196 D. 28, 28
Mathematics
Provide an appropriate response.How can you use a proportion to solve a percent word problem? Explain in your own words.
What will be an ideal response?
Mathematics
Solve the problem.Use Gauss's function, f(n) = 
n2 + 
n, to find a natural number n such that the sum of the first n natural numbers is 
A. 29 B. 28 C. 26 D. 27
Mathematics
Solve the system for all real solutions, using any suitable method.
?
?
A. 
B. 
C. 
D. 
E. inconsistent
Mathematics