Find the domain of the function.f(x) = 
+ 
A. (-?, -5) or (-5, 10) or (10, ?)
B. (-?, -10) or (5, ?)
C. (-?, ?)
D. (-?, -10) or (-10, 5) or (5, ?)
Answer: D
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Perform the indicated operations.
? 
÷ 
A. 
B. 1
C. 
D. 
Find the particular solution to the given differential equation that satisfies the given conditions.D4y + 2 D3y - 15 D2y = 0; y = 0, Dy = 9, D2y = 27, and 
when x = 0
A. y = -3 - 3e3x B. y = c1 + c2x + c3e3x + c4e-5x C. y = -3 + 3e-3x D. y = -3 + 3e3x
Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. -5
C. 
D. -5
Solve the problem.There are five brands of a product on the market, three of which have very loyal customers who never change brands. The transition matrix for the five brands is shown below (where the brands are labeled A, B, C, D, and E). About how many times, on average, will a person currently using brand C use brand D before trying one of the brands that have loyal followings? Round your answer to the nearest hundredth.ABCDE
A. 1.23 B. 0.34 C. 1.19 D. 0.20