Solve the problem.The daily profit in dollars of a specialty cake shop is described by the function 
where x is the number of cakes prepared in one day. The maximum profit for the company occurs at the vertex of the parabola. How many cakes should be prepared per day in order to maximize profit?
A. 56 cakes
B. 28 cakes
C. 784 cakes
D. 4704 cakes
Answer: B
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Solve the problem.The pressure of oxygen gas in a closed container can be described approximately by the Dieterici equation P = 
e-0.0006/T,where T is the Kelvin temperature of the sample and v is the volume in liters.If 
and 
, in what "direction" should we change (v, T) to make the pressure increase as rapidly as possible?
A. In the direction 
B. In the direction 
C. In the direction 
D. In the direction 
Graph the function over a one-period interval.y = - 
sin 2
A. 
B. 
C. 
D. 
Find the product.(-0.5)(-19.7)
A. 20.2 B. -19.2 C. 9.85 D. -20.2
Determine if the given ordered triple is a solution of the system.(-5, -1, 5)3x + 2y + z = 82x - 3y - z = 184x + y + 5z = -6
A. solution B. not a solution