Solve the problem.The manufacturer of a CD player has found that the revenue R (in dollars) is
when the unit price is p dollars. If the manufacturer sets the price p to maximize revenue, what is the maximum revenue to the nearest whole dollar?
A. $592,900
B. $148,225
C. $296,450
D. $1,185,800
Answer: B
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (cosh t)i + (sinh t)j + tk
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k
B. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k
C. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k
D. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k
Find the nth, or general, term.x, 1, 
, . . .
A. 
2-n
B. xn
C. x2-n
D. xn-1
Solve the problem.A rectangular sea aquarium observation window is 16 ft wide and 6 ft high. What is the force on this window if the upper edge is 3 ft below the surface of the water. The density of seawater is 64 lb/ft3.
A. 73,700 lb B. 36,900 lb C. 23,000 lb D. 41,500 lb
Provide an appropriate response.Write 
without summation notation. Do not evaluate.
What will be an ideal response?