Provide an appropriate response.What form do planes perpendicular to the z-axis have in spherical coordinates?
A. ? = a sin ?
B. ? = a cos ?
C. ? = a sec ?
D. ? = a csc ?
Answer: C
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Solve the problem.The formula A = 
gives the approximate annual interest rate for a consumer loan paid off with monthly payments, where f is the finance charge on the loan, p is the number of payments, and b is the original amount of the loan. Find the approximate annual interest rate for an automobile loan to be repaid in 36 monthly installments if the finance charge on the loan is $519 and the original loan balance is $2420.(Round your answer to two decimal places, if necessary.)
A. 14.71% B. 14.29% C. 13.11% D. 13.91%
Solve the problem.Economists use what is called a Leffer curve to predict the government revenue for tax rates from 0% to 100%. Economists agree that the end points of the curve generate 0 revenue, but disagree on the tax rate that produces the maximum revenue. Suppose an economist produces this rational function,
where R is revenue in millions at a tax rate of x percent. Use a graphing calculator to graph the function. What tax rate produces the maximum revenue? What is the maximum revenue?
A. 29.7%; $467 million B. 31.4%; $464 million C. 28.1%; $470 million D. 26.5%; $469 million
Add or subtract. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
Determine whether the equation defines y as a function of x. y = |x|
A. function B. not a function