Solve the problem.The voltage E in an electrical circuit is given by E = 5.8 cos 30?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 15
B. 
C. 30
D. 
Answer: A
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Use the table to calculate the tax owed. Round to the nearest cent.
a married couple filing jointly with a taxable income of $500,000 and a $4500 tax credit
A. $143,666.30 B. $139,164.55 C. $196,218.00 D. $139,166.30
Solve the problem.Suppose that a cost-benefit model is given by ?f(x) = 
where f(x) is the cost in thousands of dollars of removing x percent of a given pollutant. What is the vertical asymptote of the graph of this function? What does this suggest about the possibility of removing all of the pollutant? Explain your reasoning.
What will be an ideal response?
Find dy/dx by implicit differentiation.xy + x + y = x2y2
A. 
B. 
C. 
D. 
Answer the question.The following table gives the electricity usage in kilowatt-hours (kwh) for the Peters family for the first six months of 2001.
What is the average electricity usage for the months January through May?
A. 923.06 kwh B. 944.12 kwh C. 945.23 kwh D. 957.49 kwh