Solve. 4 – 9x = 4
A) 9
B) 1
C) 0
D) 8
E) 2
C) 0
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Solve the problem.If f(x, y) = (2000ey)/(1 + 
/2) represents the population density of a planar region on Earth, where x and y are measured in miles, find the number of people within the rectangle -9 ? x ? 9 and -4 ? y ? 0.
A. 4000(1 - e-4) ln 5 ? 9416
B. 4000(1 - e-4) ln 
? 6694
C. 2000(1 - e-4) ln 
? 3347
D. 8000(1 - e-4) ln 
? 13,388
Solve the problem.Sarah has grades of 66 and 78 on his first two tests. If she wants an average of at least 70 after her third test, what score must she make on that test?
A. 72 or more B. 71 or more C. 70 or more D. 66 or more
On the real number line, label the points with the given coordinates.-3.75, -1, 1, 3.25 
A. 
B. 
C. 
D. 
Determine whether the function is one-to-one.
?
?
A. No, it isn't one-to-one. B. Yes, it is one-to-one.