Solve the problem.In a particular situation, the pressure, P, exerted on a person's eardrum at a distance of 6 feet from the source is given by the function: P(t) = 
cos (2n? - ct) , where n is a positive integer. Use the difference identity for cosine to simplify P in this situation.
A. P(t) = cos (ct)
B. P(t) = 
cos (ct)
C. P(t) = 
cos (ct + 6)
D. P(t) = 
cos (ct) - 
sin (ct)
Answer: B
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For what values of x does the series converge absolutely?
A. 0 ? x < ? B. -1 < x < 1 C. -1 ? x ? 1 D. x = 0
Use the table to determine the probability. Round your answer to three decimal places if necessary.The table gives the number of degrees earned in a certain university in the 2007-2008 academic year.
If a student receiving a degree is randomly selected, what is the probability that the person selected is female?
A. 0.527 B. 0.577 C. 0.423 D. 0.373
Write the solution set in interval notation.x > 
A. [
, ?)
B. (-?, 
)
C. (-?, 
]
D. (
, ?)
Find the missing value. Round money to the nearest cent, rate to the nearest tenth of a percent, and time to the nearest month.Principal: $9620Interest: $750.97Rate: 10.5%Time: 
A. 10 months B. 11 months C. 9 months D. 8 months