Identify the group of terms as like or unlike.14v7, -6v7
A. Unlike
B. Like
Answer: B
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Sketch the coordinate axes and then include the vectors A, B, and A × B as vectors starting at the origin.u = i, v = k
What will be an ideal response?
Add.1 + (-1)
A. 1 B. 0 C. 2 D. -1
Solve the problem.A railroad tunnel is shaped like a semiellipse. The height of the tunnel at the center is 35 ft and the vertical clearance must be 21 ft at a point 8 ft from the center. Find an equation for the ellipse. 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.An artifact is discovered at a certain site. If it has 62% 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. 1661 years B. 3824 years C. 4960 years D. 3040 years