Using a calculator, evaluate to four decimal places.ln 0.991
A. 0.0039
B. -0.0039
C. -0.0090
D. 0.0090
Answer: C
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 5x2 - 7y2
A. Domain: all points in the first quadrant of the xy-plane; range: all real numbers; level curves: hyperbolas 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: ellipses 
C. Domain: all points in the xy-plane; range: all real numbers; level curves: hyperbolas 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: ellipses 
For the given polar equation, write an equivalent rectangular equation.r = 2cot ? csc ?
A. y2 = 2x
B. y = 
C. y = 2x
D. y = 2x2
Solve.The population in a particular country is growing at the rate of 2% per year. If 3,819,000 people lived there in 1999, how many will there be in the year 2007? Use the equation
to solve and round to the nearest ten-thousand
A. Approximately 4,930,000 people B. Approximately 4,480,000 people C. Approximately 5,380,000 people D. Approximately 4,390,000 people
Find the sum of the angles of a polygon with 9 sides. ?
A. 
B. 
C. 
D. 
E. none of these