Solve the problem.An artifact is discovered at a certain site. If it has 56% of the carbon-14 it originally contained, what is the approximate age of the artifact? (carbon-14 decays at the rate of 0.012% annually.)
A. 4832 yr
B. 4667 yr
C. 2098 yr
D. 3667 yr
Answer: A
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Solve the problem.Two machines are turned on at 8:00 A.M. If one can produce 39 items each hour and the other can produce 58 items each hour, at what time will they produce a total of 582 items?
A. 3:30 P.M. B. 2:00 P.M. C. 3:00 P.M. D. 1:00 P.M.
Determine the metric unit that would best be used to measure the volume.The amount of milk transported by a tank truck
A. cubic centimeters B. cubic millimeters C. milliliters D. kiloliters
Find the complex conjugate of the complex number. Then find the product of each complex number and its complex conjugate.-6 - 7i
A. -13; 85 B. -6 + 7i; 85 C. 1; 85 D. -6 - 7i; 85
Solve the problem.The logistic growth model 
represents the population of a species introduced into a new territory after t years. What will the population be in 30 years?
A. 360 B. 312 C. 319 D. 2347