Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers 0 ? z ? 1; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 1
B. Domain: all points in the xy-plane; range: real numbers 0 ? z ? 1; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 1
C. Domain: all points in the xy-plane satisfying x2 + y2 = 1; range: real numbers 0 ? z ? 1; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 1
D. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at 
Answer: A
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Solve the problem.Mari drops a ball from a height of 15 meters and notices that on each bounce the ball returns to about 
of its previous height. About how far will ball travel before it comes to rest?
A. 90 m B. 75 m C. 37.5 m D. 45 m
Determine whether A = B, A ? B, B ? A, A ? B, B ? A, or if none of these applies.A = {x 
}B = {x 
}
A. B ? A B. B ? A C. A ? B D. B ? A and B ? A
Use Venn diagrams to determine whether the following statements are equal for all sets A and B.(A ? B) ? (B ? C), B ? (A ? C)
A. not equal B. equal
Provide an appropriate response.Perform the indicated operation. Write answer with positive exponents: 4x(3x2 - 2x - 5)
What will be an ideal response?