Solve and check.9y2 + 27y + 20 = 0
A. - 
, - 
B. - 
, - 
C. 
, 
D. 
, - 
Answer: A
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Solve the problem.Find an equation for the level surface of the function f(x, y, z) = ln
that passes through the point 
.
A. ln 
= 9
B. ln 
= 
C. 
= e11
D. 
= e9
Add.1.731 + 62
A. 63.841 B. 63.731 C. 63.732 D. 63.721
Find the prime factorization of the number.14
A. 2 + 7 B. 2 ? 9 C. 2 ? 8 D. 2 ? 7
Solve the problem.A computer company invested a total of $400 million in research and development in its scanners and video digitizers. If the amount the company spent on research and development on scanners was $146 million more than was spent on research and development on its video digitizers, how much in fact did the company spend on research and development on its scanners?
A. $200 million B. $273 million C. $127 million D. $400 million