Solve the problem.The sales of a mature product (one which has passed its peak) will decline according to the function 
where t is time in years since the peak sales. Find the sales of a product 24 years after its peak sales if 
and 
A. 10,996,672 units
B. 70 units
C. 44,051 units
D. 140 units
Answer: D
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Evaluate the integral.
A. 
csch (ln x) + C
B. x csch (ln x) + C
C. 
csch (ln x) + C
D. 2 sech (ln x) + C
Solve the problem.A gas station sells 4820 gallons of regular unleaded gasoline in a day when they charge $1.35 per gallon, whereas they sell 3895 gallons on a day that they charge $1.40 per gallon. Find a linear function that expresses gallons sold as a function of price. Use this function to predict the number of gallons sold at a price of $1.28 per gallon.
A. 6111.7 gallons B. 6119.1 gallons C. 6124 gallons D. 6115 gallons
The cost of operating an electrical appliance is given by the formula c + 0.001 wtk, where c is the cost of operating the appliance, w is the number of watts, t is the number of hours, and k is the cost per kilowatt-hour. Find the cost per kilowatt-hour if it costs $0.07 to operate a 900-watt microwave for 2 h. Round your answer to two decimal places.
A) $0.07 B) $0.13 C) $0.04 D) $0.09 E) $0.84
Which of the following transformations maps an isosceles trapezoid onto itself?
(a) A 180 rotation around the point of intersection of the diagonals (b) A reflection with respect to the midsegment of the trapezoid (c) A 90 rotation around a base vertex (d) A reflection with respect to the perpendicular bisector of a base (e) All of these are correct.