Decide whether the statement is an example of the commutative, associative, identity, inverse, or distributive property.(6 ? 2) ? 9 = 6 ? (2 ? 9)
A. Identity
B. Associative
C. Commutative
D. Distributive
Answer: B
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Find the velocity vector in terms of ur and u?.r = a(4 - cos ?) and 
= 7
A. v = 7a(4 - cos ?)ur + (7a sin ?)u? B. v = (4a sin ?)ur + 4a(7 - cos ?)u? C. v = (7a cos ?)ur + 7a(4 - sin ?)u? D. v = (7a sin ?)ur + 7a(4 - cos ?)u?
Solve the problem.Kate has a total of $2206 in her checking account. If she writes a check for each of the items below, how much money will be left in her account?phone$ 48rent$750car$429
A. $1227 B. $978 C. $969 D. $979
Match the equation of the ellipse with the appropriate description. 
+ 4y2 = 6400
A. x-intercepts (2500, 0), (-2500, 0); y-intercepts (0, 89), (0, -89)
B. x-intercepts (50, 0), (-50, 0); y-intercepts (0, 40), (0, -40)
C. x-intercepts (40, 0), (-40, 0); y-intercepts (0, 50), (0, -50)
D. x-intercepts 
, 
; y-intercepts (0, 80), (0, -80)
If the following is a polynomial function, then state its degree and leading coefficient. If it is not, then state this fact.f(x) = 
A. Degree: 4; leading coefficient: 2 B. Not a polynomial function C. Degree: 2; leading coefficient: 4 D. Degree: 12; leading coefficient: 2