Solve the problem.Suppose that the amount of oil pumped from a well decreases at the continuous rate of 
per year. When, to the nearest year, will the well's output fall to one-eighth of its present value?
A. 11 years
B. 2 years
C. 16 years
D. 24 years
Answer: C
Mathematics
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Determine if the graph represents y as a function of x.
A. Function B. Not a function
Mathematics
Solve the system of equations.5x -6y - z = -8x + 8y - 9z = 18-8x + y + z = -32
A. {(5, 3, 5)} B. {(-5, 5, 10)} C. ? D. {(5, 5, 3)}
Mathematics
Find all specified roots.Fifth roots of 1.
A. 1, cis 
, cis 
, cis 
, cis 
B. 1, cis 
, cis 
, cis 
, cis 
C. 1, cis 
, cis 
, cis 
,-1
D. -1, cis 
, cis 
, cis 
, cis 
Mathematics
Use the fundamental identities and the given information to find the exact values of the remaining trigonometric functions of x.csc x = 
and cot x = 
A. sin x = 
, cos x = 
, tan x = 
, sec x = 
B. sin x = 
, cos x = 
, tan x = 
, sec x = 
C. sin x = 
, cos x = - 
, tan x = 
, sec x = - 
D. sin x = - 
, cos x = 
, tan x = - 
, sec x = 
Mathematics