Simplify.
+ 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.An artifact is discovered at a certain site. If it has 77% 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.)
A. 908 yr B. 1840 yr C. 6160 yr D. 2091 yr
Mathematics
Find a polar equation of the conic that has a focus at the pole and that satisfies the given conditions.Ellipse; vertices (6, 0) and (4, ?)
A. r = 
B. r = 
C. r = 
D. r = 
Mathematics
Solve.x + 
= 
A. 
B. 
C. 
D. 
Mathematics
Give the equation of the horizontal asymptote, if any, of the function.h(x) = 
A. no horizontal asymptote
B. y = 0
C. y = 
D. y = 4
Mathematics