Solve.The function f(x) = 300(0.5)x/50 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 125 pounds
B. 168 pounds
C. 180 pounds
D. 131 pounds
Answer: D
Mathematics
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Solve the equation by completing the square.6x2 - 3x = 9
A. 
, 0
B. 
, -1
C. 
, -1
D. 
, 1
Mathematics
Solve the problem.Find the perimeter of the polygon with the following vertices. Round to the nearest hundredth. A(1, 1), B(2, 5), C(5, 4), D(4, 2), E(3, 2)
A. 10.52 B. 12.76 C. 11.52 D. 14.64
Mathematics
Find the vertices and foci of the hyperbola.
- 
= 1
A. Vertices: (1, -4), (-11, -4); Foci: (-15, -4), (5, -4) B. Vertices: (3, -4), (-13, -4); Foci: (-13, -4), (3, -4) C. Vertices: (-4, 3), (-4, -13); Foci: (-4, -13), (-4, 3) D. Vertices: (-4, 1), (-4, -11); Foci: (-4, -15), (-4, 5)
Mathematics
Evaluate the sum. Round to the nearest hundredth, if necessary.
A. 34 B. 22 C. 30 D. 39
Mathematics