Find an upper bound for the magnitude |E| of the error in the linear approximation L to f at the given point over the given region.
at 
R: |x + 7| ? 0.1, |y + 10| ? 0.1
A. |E| ? 0.02
B. |E| ? 0.04
C. |E| ? 0.06
D. |E| ? 0.08
Answer: D
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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; range: real numbers 0 ? z ? 10; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 10
B. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at 
C. Domain: all points in the xy-plane satisfying x2 + y2 ? 100; range: real numbers 0 ? z ? 10; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 10
D. Domain: all points in the xy-plane satisfying x2 + y2 = 100; range: real numbers 0 ? z ? 10; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 10
Evaluate the expression.61
A. 
B. 6
C. 1
D. -6
Solve the system of equations graphically.A lumber yard has fixed costs of $2716.60 per day and production costs of $0.13 per board-foot produced. Lumber sells for $1.83 per board-foot. How many board-feet must be produced and sold daily to break even?
A. 1386 board-feet B. 1598 board-feet C. 20,896 board-feet D. 1065 board-feet
Find fraction notation for the percent notation in the problem.A serving of cooked white rice provides 7% of the daily requirement of an essential mineral.
A. 
B. 
C. 
D. 