Write the sentence as a proportion. Then determine whether the proportion is true or false.one fifth is to two fifteenths as two thirds is to four ninths
A. 
= 
; false
B. 
= 
; true
C. 
= 
; false
D. 
= 
; true
Answer: B
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Find the area of the region specified by the integral(s).
+ 
A. 128 B. 64 C. 8 D. 4
Determine if the function is concave up or concave down in the first quadrant.y = x0.8
A. Concave down B. Concave up
Solve the inequality graphically, numerically, or symbolically, and express the solution in interval notation. Where appropriate, round to the nearest tenth.
> 2
A. (-?, -3.7) ? (-2.3, ?) B. (-3.7, -2.3) C. (-2.3, -3.7) D. (-?, -2.3) ? (-3.7, ?)
The annual revenue earned by Wal-Mart in the fiscal years ending January 31, 1994 to January 31, 2002 can be approximated by 
billion dollars per year 
variablename="impvar_3097e51fefd44c62a3367efd2" /> where t is time in years (
represents January 31, 2000). Suppose that, from January 1999 on, Wal-Mart invested its revenue in an investment that depreciated continuously at a rate of 4% per year. What, to the nearest $10 billion, would the total value of Wal-Mart's revenues have been by the end of January 2002?
?
A. Total revenue ? 460 billion dollars
B. Total revenue ? 4,600 billion dollars
C. Total revenue ? 50 billion dollars
D. Total revenue ? 230 billion dollars
E. Total revenue ? 90 billion dollars