Use the given table to find the indicated probability.People in a survey were given three choices of soft drinks and asked to choose one favorite. The following table shows the results.
One of the participants is selected at random. Find the probability that the person is over 40 given that they prefer root beer.
A. 
B. 
C. 
D. 
Answer: C
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The following table shows the number of bird species found on an island of area A square miles that is part of a particular Pacific island chain.
1020304050
2531363942?
Calculate the average rate of change in the number of species as the area changes from 30 to 40 square miles.
A. 2.28 species per square mile B. 39.00 species per square mile C. 0.30 species per square mile D. None of the above
Solve the problem.In a particular situation, the pressure, P, exerted on a person's eardrum at a distance of 12 feet from the source is given by the function: 
where n is a positive integer. Use the difference identity for cosine to simplify P(t).
A. P(t) = 
cos (ct)
B. P(t) = 
cos (ct + 12)
C. P(t) = 
cos (ct) - 
sin (ct)
D. P(t) = cos (ct)
Determine whether the equation is an identity. If it is an identity, prove it.sin ? sec ? = cos ? csc ?
What will be an ideal response?
Graph the circle whose radius is r and whose center is (h, k). r = 
; (h, k) = (-3, 4)
A. 
B. 
C. 
D. 