Identify the equation as either an identity or not.(sin x + cos x)2 = 1
A. Identity
B. Not an identity
Answer: B
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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 
Solve the problem.Find the surface area of a right rectangular prism 18.2 cm × 10.9 cm × 14.6 cm. Round your answer to the nearest whole number.
A. 1112 cm2 B. 1246 cm2 C. 623 cm2 D. 1087 cm2
Write the expression as a sum, difference, or multiple of logarithms.log3
A. 5 log3x + 2 log3y - log3z - 
log3w
B. 10 log3xy - 
log3wz
C. 7 log3xy - 
log3wz
D. log3x5 + log3y2 - log3z - log3w4/5
Evaluate.6C6
A. 720 B. 180 C. 1 D. 0.5