Simplify the expression. Write the result using positive exponents only.(-4)-2
A. -16
B. 
C. - 
D. 16
Answer: B
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Find the least common multiple of the numbers in the group.120, 270
A. 30 B. 1080 C. 2160 D. 3240
Integrate the function.
A. 
ln
B. 
ln
C. 
ln
D. 
ln
Solve the problem.The velocity of a body of mass m falling from rest under the action of gravity is given by the equation 
where k is a constant that depends on the body's aerodynamic properties and the density of the air, g is the gravitational constant, and t is the number of seconds into the fall. Find the limiting velocity, limt?? v, of a 170 lb. skydiver (mg = 170) when k = .006.
A. 53.23 ft/sec B. There is no limiting speed. C. 0.01 ft/sec D. 168.33 ft/sec
Provide an appropriate response.What is the range of the function y = 
x?
A. (-?, 0) B. (0, ?) C. [0, ?) D. (-?, ?)