State the degree of the polynomial and whether it is a monomial, a binomial, or a trinomial.-5xy4
A. monomial, degree is 1
B. monomial, degree 4
C. binomial, degree 5
D. monomial, degree 5
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) = 
A. Domain: all points in the xy-plane satisfying x2 + y2 = 81; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
B. Domain: all points in the xy-plane; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
C. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at 
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 81; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
Perform the operation or operations when possible.
+ 
A. 
B. 
C. They cannot be added.
D. 
Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of summation.7 + 9 + 11 + 13 + . . . + 23
A. 
B. 
C. 
D. 
Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 5i + 4j, w = 2i - 6j
A. 147.1° B. 57.1° C. 110.2° D. 74.5°