Simplify the rate and write the result in words.
A. 
; 10 computers for every 7 printers
B. 
; 8 printers for every 56 computers
C. 
; 10 printers for every 7 computers
D. 
; 80 printers for every 8 computers
Answer: C
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Solve the problem.The logarithmic function f(x) = -200 + 88 ln x models the number of visitors (in millions) to U.S. museums from 1960 to 2010, where x is the number of years since 1960. Is this function increasing or decreasing?
A. increasing B. decreasing
Find 
. Express the answer in standard form.z1 = 20(cos 240° + i sin 240°)z2 = 4(cos 30° + i sin 30°)
A. - 
+ - 
i
B. - 
- 
i
C. - 
- 
i
D. - 
- 
i
Use Cramer's rule to solve the system.-5x + 3y - z = 3 x + 7y + 4z = 45 -5x + y + z = -3
A. {(3, 3, 2)} B. {(2, 5, 2)} C. {(5, 2, 5)} D. {(2, -5, -2)}
Find all values of x for which the following is true. ? sec x is undefined. ?
A. 
B. 
C. 
D. 
E. 