Solve the problem.A water tank is formed by revolving the curve y = 6x4 about the y-axis. Water drains from the tank through a small hole in the bottom of the tank. At what constant rate does the water level, y, fall? (Use Torricelli's Law: dV/dt = -m
.)
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: D
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Use the graph to answer the question.
Mike decides to buy shares of companies A, B, and C, which were initially selling for the same price. The changes in each stock's value are shown in the graph above. At its peak, stock A was valued at approximately how much more than either B or C?
A. $15 B. $10 C. $30 D. $35
Solve and check the equation.x - 15 = -4
A. {-19} B. {11} C. {-11} D. {19}
Solve the problem.Marty's Tee Shirt & Jacket Company is to produce a new line of jackets with an embroidery of a Great Pyrenees dog on the front. There are fixed costs of $610 to set up for production, and variable costs of $30 per jacket. Write an equation that can be used to determine the total cost, C(x), encountered by Marty's Company in producing x jackets.
A. C(x) = 610 + 30x B. C(x) = 610 - 30x C. C(x) = (610 + 30) x D. C(x) = 610x + 30
Factor completely. If the polynomial is prime, then state this as your answer.x2 - x - 72
A. (x + 1)(x - 72) B. prime C. (x + 8)(x - 9) D. (x + 9)(x - 8)