Solve.What number is 54% of 40?
A. 21,600
B. 216
C. 2,160
D. 21.6
Answer: D
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Provide an appropriate response.What must be true of a real number a if 
and - 
represent the same number?
A. a can be any real number B. a must be negative C. a must be positive D. a must be equal to zero
Suppose the weekly demand function for a product is 
where p is the price in thousands of dollars and q is the number of units demanded. What is the elasticity of demand when the price is $1,000 and the quantity demanded is 357? Round your answer to two decimal places.
?
A. 
B. 
C. 
D. 
E. 
Solve the problem.The rate of a continuous money flow starts at $1000 and decreases exponentially at 4% per year for 10 years. Find the final amount if interest is earned at 2% compounded continuously.
A. $9184.71 B. $37,092.35 C. $31,528.71 D. $16,735.64
The average salaries S (in thousands of dollars) for elementary school teachers in the United States from 1990 through 2005 are approximated by the model
?
?
where t represents the year, with t = 0 corresponding to 1990.
If this relationship between salary and time continues, when will the average salary exceed $58,000?
(Round the answer to two decimal places.)
?
A. t> 24.86 (2015) B. t< 28.86 (before 2015) C. t> 25.86 (2016) D. t< 26.86 (before 2017) E. t> 27.86 (2018)