Use Descartes's Rule of Signs to determine the possible number of positive and negative real zeros for the given function.f(x) = -7x9 + x7 - x2 + 3
A. 3 or 1 positive zeros, 3 or 1 negative zeros
B. 3 or 1 positive zeros, 2 or 0 negative zeros
C. 2 or 0 positive zeros, 2 or 0 negative zeros
D. 2 or 0 positive zeros, 3 or 1 negative zeros
Answer: B
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Solve the system of equations by the substitution method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent.6x + 9y = -42-3x + 4y = 21
A. (-8, 1) B. (-7, 0) C. (-7, 1) D. No solution; inconsistent
Evaluate the integral.
dx
A. 4 sin 2x - 
sin3 2x + C
B. 8 sin 2x - 
sin3 2x + C
C. 4 sin 2x - 
cos3 2x + C
D. 4 sin 2x + 
sin3 2x + C
Solve the problem. Round all circumference and area calculations to the nearest whole number.If asphalt pavement costs $0.90 per square foot, find the cost to pave the circular road (indicated by dots) in the figure shown.
A. $113.10 B. $5654.87 C. $10,142.76 D. $4523.89
True or false?The union of the sets (-?, -15] and (-15, ?) is (-?, ?)
A. True B. False