Solve the application.Find the difference in altitude between a diver 21.47 meters below sea level and a sea floor 27.21 meters below sea level.
A. 5.74 m
B. -5.74 m
C. 48.68 m
D. -48.68 m
Answer: A
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Write as a decimal.
%
A. 0.5175 B. 0.5125 C. 5.1025 D. 0.0535
Solve the problem.Find the value for x in the following special right triangle. Use exact values. 
4 in.
A. 16 in.
B. 2 in.
C. 4
in.
D. 4 in.
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. 28.1%; $470 million B. 31.4%; $464 million C. 26.5%; $469 million D. 29.7%; $467 million
Solve the problem.Assume that the half-life of Carbon-14 is 5700 years. Find the age (to the nearest year) of a wooden axe in which the amount of Carbon-14 is 30% of what it originally had.
Fill in the blank(s) with the appropriate word(s).