Simplify.
A. 
B. 17
C. - 
D. 
Answer: A
Mathematics
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Solve the problem.The function A = Aoe-0.0099x 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 500 pounds of the material are placed in the vault, how much time will need to pass for only 226 pounds to remain?
A. 85 years B. 160 years C. 90 years D. 80 years
Mathematics
Find all solutions in [0, 2?) for the equation.sin
= 
A. 
B. 
C. 
D. 
Mathematics
The polar equation represents a conic with a focus at the pole. Identify the conic.r = 
A. parabola B. hyperbola C. not a conic D. ellipse
Mathematics
Solve the system by the substitution method.
+ y2 = 36
A. (0, -6), (
, 5)
B. (0, 6), (- 
, 5)
C. (- 
, 5), (0, -6), (
, 5)
D. (0, 6), (
, 5)
Mathematics