Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.P(x) = -4x4 - 6x3 - 2x2 - 4x + 2
A. 0 or 2 positive; 0 or 2 negative
B. 1 positive; 1 or 3 negative
C. 1 positive; 2 negative
D. 1 positive; 1 negative
Answer: B
Mathematics
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Simplify. Include the absolute value symbol if necessary. If the answer is not a real number, state so.
A. 6x2 B. not a real number C. 14x2 D. 36x2
Mathematics
Solve the problem.A rock falls from a tower that is 117.6 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground 
Round to the nearest tenth, if necessary.
A. 10.8 sec B. 10.6 sec C. 4.9 sec D. 2822.4 sec
Mathematics
Write the ratio in lowest terms.8
tons to 8
tons
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the expression.sin 60° - cos 30°
A. 0
B. 1
C. 
D. 
Mathematics