Find a basis for the null space of the matrix.A = 
A. 
B. 
C. 
D. 
Answer: C
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Find the domain and range of the inverse of the given function.f(x) = 
A. Domain and range: all real numbers B. Domain: [4, ?); range: [4, ?) C. Domain: [4, ?); range: [0, ?) D. Domain: [0, ?); range: [4, ?)
Find the value of d2y/dx2 at the point defined by the given value of t.x = t, y = 
, t = 7
A. - 
B. - 
C. - 
D. 
Use rational exponents to simplify the radical. If rational exponents appear after simplifying, write the answer in radical notation.
A. 
B. 
C. 
D. 5
If a firm generates excessive debt after an acquisition, credit rating agencies will reduce its credit rating. This reflects the fact that the firm
A. is likely to become an acquisition target itself. B. did not perform adequate due diligence before the acquisition. C. has become overdiversified. D. is a riskier investment.