Convert to an expression with a rational exponent.
A. s-4
B. b-1/3
C. s-6
D. s-3
Answer: D
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Choose the function that matches the graph.
A. f(x) = (-5 - x)(2x + 7) B. f(x) = (-5 + x)(2x - 7) C. f(x) = (-5 - x)(-7 - 2x) D. f(x) = (x + 5)(2x + 7)
If n is a natural number, then 10-n = 
. Negative powers of 10 can be used to write the decimal part of Hindu-Arabic numerals in expanded form. Express the expanded form as a Hindu-Arabic numeral.(3 × 10-1) + (7 × 10-2) + (9 × 10-3)
A. 3.79 B. 0.190 C. 0.379 D. 19
Solve the problem.Consider a project consisting of nine tasks (A through I) with the following processing times (in hours): 
D(3), E(6), F(4), G(8), H(7), and I(4). If a schedule with four processors has a finishing time of 15 hours, what is the total idle time in the schedule?
A. 6 hours. B. 8 hours. C. 2 hours. D. 4 hours. E. none of these
Multiply.-12x(4x + 9)
A. -48x2 + 9x B. -156x2 C. -48x2 - 108x D. 4x2 - 108x