Solve the problem.A formula for the focal length of a lens is f = 
. Calculate f (the focal length) for a = 6 cm and b = 8 cm. Round to the nearest tenth of a centimeter, if necessary.
A. 3.0 cm
B. 2.6 cm
C. 3.4 cm
D. 4.0 cm
Answer: C
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Change the Cartesian integral to an equivalent polar integral, and then evaluate.
A. 
B. 
C. 
D. 
Give an appropriate answer.The following table shows the average life expectancy in a certain country in the given years. 
Draw a bar graph that makes the increase in the life expectancy look large.
What will be an ideal response?
For an election with 4 candidates (A, B, C, and D), we have the following preference schedule:
Using the plurality method, the winner of the election is
A. A. B. B. C. C. D. D. E. none of these
Provide an appropriate response. Graph sin x, sin 2x, and sin 0.5x on the same graph. Compare the graphs. How are they alike and how are they different? Use a graphing calculator.
What will be an ideal response?