Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62
B. 0.26
C. 0.22
D. 0.50
Answer: A
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Divide and simplify. Assume that all variables represent positive real numbers.
A. 6
B. 2
C. 2
D. 6
Find the first and second derivatives of the function.
?
What will be an ideal response?
Find an equation of variation for the given situation.y varies jointly as x and the square of z and inversely as w , and y = 
when 
and 
A. y = 
B. y = 
C. y = 
D. y = 
Solve the problem.Suppose that the number of inhabitants of Country A is given by 
million, and the number of inhabitants of Country B is given by 
million, where x is the number of years since 2010. When the number of inhabitants of Country A equals the number of inhabitants of Country B, how many people inhabit each country?
A. 849,072,000 people B. 848,346,000 people C. 849,798,000 people D. 847,620,000 people