Solve.The function A = A0e-0.01386x 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 700 pounds of the material are placed in the vault, how much time will need to pass for only 152 pounds to remain?
A. 120 yr
B. 220 yr
C. 115 yr
D. 110 yr
Answer: D
Mathematics
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A. 2x + 12 B. x + 12 C. 2x + 6 D. 12x
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Find an equation for the line with the given properties.Perpendicular to the line -3x - y = 8; containing the point (0, - 
)
A. y = - 
B. y = 
x + 8
C. y = 
x - 
D. y = - 
x - 
Mathematics
List the x- and y-intercepts, and graph the function.f(x) = 
A. x-intercept: 
, y-intercept: 
B. x-intercept: x-intercept: 
, y-intercept: 
C. x-intercept: 
, y-intercept: 
D. x-intercept: x-intercept: 
, y-intercept: 
Mathematics
Find the domain of the rational function.R(x) = 
A. {x|x ? 10, 3} B. {x|x ? 10, -3} C. {x|x ? - 30, 1} D. {x|x ? -10, 3}
Mathematics