Solve the problem.An artifact is discovered at a certain site. If it has 78% of the carbon-14 it originally contained, what is the approximate age of the artifact to the nearest year? Carbon-14 decays at the rate of 0.0125% annually. Round to the nearest year, if necessary.
A. 1760 years
B. 1988 years
C. 863 years
D. 6240 years
Answer: B
Mathematics
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Solve the equation 
. Restrict your attention to the horizontal span of 0 to 5. Round your answer to two decimal places if necessary.
?
A. 2.12 B. 0.75 C. 0.97 D. 2.05
Mathematics
Evaluate the combination.
A. 9
B. 
C. 40,320
D. 362,880
Mathematics
Add or subtract. Express the answer as a mixed number.7
- 
A. 12
B. 12
C. 13
D. 12
Mathematics
Write the expression in the standard form a + bi.8(8 - 8i)
A. 64i - 8i B. 64 + 64i C. 64 - 64i D. 8 - 64i
Mathematics