Find the largest open interval where the function is changing as requested.Decreasing f(x) = ?x - 8?
A. (8, ?)
B. (-?, 8)
C. (-8, ?)
D. (-?, -8)
Answer: B
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Solve the problem.You just put $1140 in a CD that is expected to earn 3% compounded quarterly, and 
in a savings account that is expected to earn 2% compounded semiannually. Determine when, to the nearest year, the values of your two investments will be the same.
A. 426 years B. 327 years C. 131 years D. 229 years
Estimate the answer by rounding as indicated.Estimate by rounding to the leftmost digit.
A. 300 B. 210 C. 200 D. 212
Write the rational expression as an equivalent rational expression with the desired denominator.
= 
A. (x - 2)(2x + 1) B. x + 3 C. (x - 2)(x + 6) D. (x + 3)(2x + 1)
Add or subtract as indicated. You will need to simplify terms to identify like radicals.4
+ 7
A. 10
B. -18
C. 18
D. 11