Solve the problem.In one city, 34% of all aluminum cans distributed will be recycled each year. A juice company distributes 248,000 cans. The number still in use after time t, in years, is given by 
Find N'(t).
A. N'(t) = 248,000(0.34)t
B. N'(t) = 248,000(ln 0.34)(0.34)t
C. N'(t) = 248,000t(0.34)t-1
D. N'(t) = 248,000(ln t)(0.34)t
Answer: B
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A. quadrant I B. quadrant II C. x-axis D. y-axis
Find all specified roots.Cube roots of 1.
A. 1, - 
+ 
i, - 
- 
i
B. -1, 1
C. 1, 
+ 
i, - 
+ 
i
D. 1, 
- 
i, - 
- 
i
An offshore oil well is leaking oil and creating a circular oil slick. If the radius of the slick is growing at a rate of 7 miles per hour, find the rate at which the area is increasing when the radius is 3 miles. (The area of a disc of radius r is 
.)
?
A. 
B. 
C. 
D. 
E. 
An augmented matrix that represents a system of linear equations (in variables x, y, z and w if applicable) has been reduced using Gauss-Jordan elimination. Find the solution represented by the augmented matrix.
?
?
A. ?(-3, 9, 3) B. (3, -9, 3) C. (-3, -9, 3) D. (-3, -9, -3) E. (-3, 3, -9)