For the function, find the interval(s) for which f'(x) is positive.f(x) = 
x3 - 2x2 - 5x + 7
A. (-?, -1) and (5, ?)
B. (-5, ?)
C. (-1, ?)
D. (-?, 1) and (5, ?)
Answer: A
Mathematics
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Find the y-intercept of the line determined by the equation.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
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Determine whether the given compound statement is a tautology.
?
?
?
A. yes B. no
Mathematics
The feasible set of a certain linear programming problem is given by the following system of linear inequalities. Without graphing this set, determine which of the following points is not in the feasible set. 
A. (0, 1) B. (-1, -8) C. (2, -3) D. (3, -4) E. none of these
Mathematics
Solve the exponential equation. For irrational solutions, round to four decimal places.e-t = 0.01
A. {-1.01} B. {1.01} C. {-4.6052} D. {4.6052}
Mathematics