Simplify the radical expression.
?
A. 
B. 
C. 
D. 
E. 
Answer: B
Mathematics
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A cleaning process is removing salt from a pool. The amount S, in pounds, of salt remaining after t hours is given in the following table. Use exponential regression to find the hourly percentage decay factor. Round your answer to two decimal places. t 1.05 4.33 7.93 11.86 15.60 S 23.36 13.22 7.62 4.43 2.23?
A. 16.56% B. 15.00% C. 16.89% D. 13.51%
Mathematics
Use the reference angle to find the exact value of the expression. Do not use a calculator.tan 
A. 
B. -
C. 
D. 
Mathematics
Evaluate.
A. -102 B. 72 C. -72 D. 338
Mathematics
Find the center and radius of the circle with the given equation. x2 + 8x + 16 + (y + 9)2 = 81
A. Center (4, 9), r = 81 B. Center (-9, -4), r = 9 C. Center (-4, -9), r = 9 D. Center (9, 4), r = 81
Mathematics