Find the sum. Simplify when necessary.-30 + (-30)
A. 0
B. -30
C. 60
D. -60
Answer: D
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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 -6 ? x ? 6 and -3 ? y ? 0.
A. 8000(1 - e-3) ln 4 ? 10,538
B. 4000(1 - e-3) ln 
? 7904
C. 4000(1 - e-3) ln 4 ? 5269
D. 2000(1 - e-3) ln 4 ? 2635
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to three decimal places.log90.187
A. -0.763 B. -1.310 C. 48.128 D. -0.728
A function and its graph are given. Use the graph to find
, if it exists. Confirm your results analytically.
A. 0
B. 8
C. 7
D. 5
E. does not exist
Determine whether the graph of the equation is a circle, parabola, ellipse, or hyperbola. Sketch the graph.x = y2 - 1
A. 
B. 
C. 
D. 