Find the sum.
A. 35
B. -3
C. 30
D. 9
Answer: A
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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 percentage decrease in salt over any 4-year period. Round your answer to two decimal places. Round your answer to two decimal places. t 1.16 4.83 8.44 11.55 15.43 S 23.29 12.16 5.54 3.04 2.16?
A. 64.00% B. 50.21% C. 65.93% D. 49.06%
Solve the triangle, if possible. Approximate values to the nearest tenth when appropriate.? = 30°, a = 19.40, b = 38.8
A. ? = 60°, ? = 90°, c = 33.6 B. ? = 60°, ? = 60°, c = 33.6 C. ? = 90°, ? = 60°, c = 33.6 D. No solution
Identify which graph matches the equation.f(x) = x2 - 4
A. 
B. 
C. 
D. 
Find the equation of the parabola with the given properties.Vertex: (-1, 4); horizontal axis of symmetry; containing the point (19, 2)
A. 
(x - 4) =(y + 1)2
B. 
(x + 1) =(y - 4)2
C. 
(y - 4) =(x + 1)2
D. 
(y + 4) =(x - 1)2