Find the indicated vector.Let u = 
, v = 
. Find 2u - 4v.
A. 
B. 
C. 
D. 
Answer: B
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Find the expected value.Find the expected number of girls in a family of 4.
A. 2 B. 2.5 C. 1.75 D. 1.5
Round the number to the place value indicated.61,005
A. 61,000 B. 62,000 C. 61,010 D. 61,100
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 except y = 0; range: all real numbers; level curves: parabolas 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
C. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
D. Domain: all points in the xy-plane except y = 0; range: real numbers z ? 0 ; level curves: parabolas 
Solve the problem.Find the complementary angle to ? = 60°.
A. 30° B. 420° C. 150° D. 120°