Solve the problem.The function A = Aoe-0.01155x 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. If 300 pounds of the material are initially put into the vault, how many pounds will be left after 140 years?
A. 223 pounds
B. 64 pounds
C. 350 pounds
D. 60 pounds
Answer: D
Mathematics
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Multiply and reduce to lowest terms.
? 
A. 
y
B. 
C. 
D. 
y
Mathematics
Solve the problem.The function H described by H(x) = 2.75x + 71.48 can be used to estimate the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long. Estimate the height of a woman whose humerus is 
long.
A. 18.17 cm B. 161.13 cm C. 106.83 cm D. 41.63 cm
Mathematics
Find the foci of the ellipse.49x2 + y2 - 392x + 735 = 0
A. (4, 4
), (4, -4
)
B. (4 + 4
, 0), (4 -4
, 0)
C. (7, 
), (7, -
)
D. (4, 7), (4, -7)
Mathematics
Graph the function.y = 2 - 3 sec 
A. 
B. 
C. 
D. 
Mathematics