Complete the trinomial so that it is a perfect square.z2 - 
z +
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.An artifact is discovered at a certain site. If it has 55% 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. 4400 years old B. 3600 years old C. 2077 years old D. 4783 years old
Mathematics
Completely factor the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Find the average value of 
over the given region.
over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 
B. 
C. 
D. 
Mathematics
Find the sum of the measures of the angles of the polygon.A decagon
A. 2160° B. 1440° C. 1800° D. 1620°
Mathematics