Translate the equation into a sentence by using the phrase "varies directly" or "varies inversely". w = 
A. h varies inversely as the cube of w.
B. w varies inversely as the cube root of h.
C. w varies directly as the cube of h.
D. w varies inversely as the cube of h.
Answer: D
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Fill in the blank with the appropriate symbol, ? or ? .
A. ? B. ?
Solve.Assume that the mathematical model C(x) = 16x + 140 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured while keeping costs between between $526,000 and $782,000?
A. 340 < x < 510 B. 510 < x < 680 C. 480 < x < 640 D. 320 < x < 480
Write the expression with positive exponents, and simplify if possible.(-2)-4
A. 16
B. - 
C. -16
D. 
Factor the trinomial containing two variables.x2 - 2xy - 15y2
A. (x - 5y)(x + 3y) B. (x + 5y)(x - 3y) C. (x - y)(x + 3y) D. (x - 5y)(x + y)