Write the product using exponential notation.13 ? 13 ? 13 ? 13 ? 13? 13 ? 13
A. 713
B. 7 ? 13
C. 7 ? 713
D. 137
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) = 9x2 - 4y2
A. Domain: all points in the xy-plane; range: all real numbers; level curves: ellipses 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: ellipses 
C. Domain: all points in the first quadrant of the xy-plane; range: all real numbers; level curves: hyperbolas 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: hyperbolas 
Evaluate the determinant.
A. -3 B. -8 C. 3 D. 27
Provide an appropriate response.Determine the slope of the equation: y = - 
x + 1
A. 
B. - 
C. 
D. 1
Solve the problem.A national poll showed that 4 out of 7 registered voters planned to watch the presidential debate. Another national poll conducted by a different organization showed that 360 of 630 registered voters planned to watch the presidential debate. Is the number of voters who plan to watch the debate proportional to the number of voters in the poll for these two different polls?
A. No B. Yes