Solve the problem.An artifact is discovered at a certain site. If it has 65% 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. 5200 yr
B. 2800 yr
C. 1497 yr
D. 3446 yr
Answer: D
Mathematics
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Translate the problem to a system of equations, then solve using Cramer's Rule.During the 2001-2002 Little League season, the Tigers played 62 games. They won 18 more games than they lost. How many games did they lose that season?
A. 40 games B. 20 games C. 25 games D. 22 games
Mathematics
Use the following table to convert the temperature numerically. If there are two choices, use the higher value. 
37.9°C
A. 100.3°F B. 37.9°C C. 38.0°C D. 100.4°F
Mathematics
Build a variable expression for the given phrase.A number decreased by two
A. x + 2
B. x - 2
C. 2 - x
D. 
Mathematics
Match the description with the correct symbolic expression.a vertical line
A. y = 6x + 2 B. x = 6 C. 6x - 5y = 2 D. f(x) = -3x + 6
Mathematics