Use Descartes's Rule of Signs to determine the possible number of positive and negative real zeros for the given function.f(x) = -8x5 - 3x4 - 1.5x3 + 7x2 + x + 6
A. 1 positive zero, 3 or 1 negative zeros
B. 1 positive zero, 2 or 0 negative zeros
C. 1 positive zero, 4 or 2 negative zeros
D. 1 positive zero, 4, 3 or 1 negative zeros
Answer: D
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Rationalize the denominator.
A. 
B. 57
C. 
D. 57
Find the missing parts of the triangle. B = 15.6°b = 16.58a = 30.83If necessary, round angles to the nearest tenth and side lengths to the nearest hundredth.
A. A = 30°, C = 134.4°, c = 44.05 B. no such triangle C. A = 150°, C = 14.4°, c = 15.33 D. A1 = 30°, C1 = 134.4°, c1 = 44.05; A2 = 150°, C2 = 14.4°, c2 = 15.33
What number is 170% of 16? Give your answer to one decimal place, if required.
Fill in the blank(s) with the appropriate word(s).
Write using exponential notation. 9 ? 2 ? 2 ? 2 ? 2 ? 2
A. 19 ? 52 B. 9 ? 25 C. 185 D. (9 ? 2)5