Solve the problem.An artifact is discovered at a certain site. If it has 72% of the carbon-14 it originally contained, what is the approximate age of the artifact? (carbon-14 decays at the rate of 0.0125% annually.) (Round to the nearest year.)
A. 5760 yr
B. 2240 yr
C. 2628 yr
D. 1141 yr
Answer: C
Mathematics
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Prove the limit statement
= 21
What will be an ideal response?
Mathematics
Perform the indicated operation. Simplify the answer when possible.
A. 
B. 3
C. 6
D. 3
Mathematics
Provide an appropriate response.Use sets to illustrate the transitive property of "less than."
What will be an ideal response?
Mathematics
Solve the problem.Tracey bought a diamond ring appraised at $2000 at an antique store. If diamonds have appreciated in value at an annual rate of 
what was the value of the ring 9 years ago? (Round your answer to the nearest dollar.)
A. $813 B. $331 C. $848 D. $4716
Mathematics