SD(X )
The probability density function of X is 
Compute the following quantity.
1.374732
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Verify the identity.
= 
What will be an ideal response?
Solve the problem.A person puts $22 into a bank account on January 1, $32 on February 1, $42 on March 1, and so forth. How much has the person put into the bank account by December 30?
A. $792 B. $984 C. $924 D. $1848
Solve the absolute value inequality. Other than ?, use interval notation to express the solution set and graph the solution set on a number line.|x - 7| > 0
A. (7, ?)
B. (-7, 7)
C. (-?, 7) ? (7, ?)
D. ?
?Suppose the sales S (in billions of dollars per year) for Proctor & Gamble for the years 1997 through 2002 can be modeled by 
, 
where t represents the year. During which year were the sales increasing at the lowest rate?
?
A. ?Sales are increasing at the lowest rate in the year 2002. B. ?Sales are increasing at the lowest rate in the year 1997. C. ?Sales are increasing at the lowest rate in the year 1998. D. ?Sales are increasing at the lowest rate in the year 2000. E. ?Sales are increasing at the lowest rate in the year 1999.