Use the region R to evaluate the double integral.
RR bounded by y = 
, y = 
x, y = 0
A. 
B. 
C. - 
D. - 
Answer: B
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Solve.Two plumbers make house calls. One charges $90 for a visit plus $40 per hour of work. The other charges $70 per visit plus $50 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 2.5 hr C. 1.5 hr D. 1 hr
Solve the problem. If necessary, round your result to the nearest tenth unless instructed differently. The precise value of your approximation may depend on the conversion path that you choose.A road that is 14 miles long is represented on a map that shows a scale of 1 centimeter being equivalent to 40 kilometers. How many centimeters long does the road appear on the map? Round your result to the nearest tenth of a centimeter.
A. 0.6 cm B. 0.2 cm C. 0.9 cm D. 22.5 cm
Tell whether the expression is a monomial. If it is, name the variable(s) and coefficient, and give the degree of the monomial.- 
A. Monomial; variables x, y; coefficient -5; degree 6 B. Monomial; variables x, y; coefficient -5; degree 2 C. Monomial; variables x, y; coefficient -5; degree 8 D. Not a monomial
Graph the polar equation.r = - 2 - sin ?
A. 
B. 
C. 
D. 