Solve the problem.A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by 
Find the rate of change of unit revenue when the unit cost is changing by 
and the unit revenue is $4000.
A. $238.30/unit
B. $334.40/unit
C. $280.00/unit
D. $430.50/unit
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: all real numbers; level curves: circles with centers at 
B. Domain: all points in the xy-plane satisfying x2 + y2 ? 9; range: real numbers 0 ? z ? 3; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 3
C. Domain: all points in the xy-plane satisfying x2 + y2 = 9; range: real numbers 0 ? z ? 3; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 3
D. Domain: all points in the xy-plane; range: real numbers 0 ? z ? 3; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 3
Find the amount on deposit on the first day of the next quarter when the sum is deposited as indicated. Use 3
% interest compounded daily. Round to the nearest cent.
Amount: $5200.78Date deposited: August 18
A. $5222.77 B. $5222.27 C. $5221.77 D. $5223.27
Find the circumference of the circle. Use 3.14 or 
for ? as indicated.Use 3.14 for ?.
A. 58.09 mi B. 232.36 mi C. 116.18 mi D. 4298.66 mi
Sketch the graph of the polynomial function.f(x) = -(x - 1)4
A. 
B. 
C. 
D. 