For the given matrix A, find k such that Nul A is a subspace of ?k and find m such that Col A is a subspace of ?m. A = 
A. k = 3, m = 3
B. k = 6, m = 6
C. k = 6, m = 3
D. k = 3, m = 6
Answer: C
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Translate into an equation, then solve.Betsy has a balance of -$470 on her credit card. What payment should she make to get the balance to 
A. -210 + x = -470; x = $360 B. -210 + x = -470; x = $260 C. -470 + x = -210; x = $260 D. -470 + x = -210; x = $360
Find the exact value of y, or state that y is undefined.y = sin-1 
A. 
B. - 
C. 
D. 
Solve the problem.Find the equation of a circle in standard form with center at the point (-3, 2) and tangent to the line y = 4.
A. (x - 3)2 + (y + 2)2 = 16 B. (x + 3)2 + (y - 2)2 = 4 C. (x + 3)2 + (y - 2)2 = 16 D. (x - 3)2 + (y + 2)2 = 4
Solve the problem.In 1971, 
and 
had the same population. The population of 
continued to increase steadily, while the rate of population growth of 
(although initially less than that of 
) eventually overtook the growth rate of City #2. The
populations of two cities are modeled by the following equations: 
: 
; 
: 
, where 
corresponds to the year 1971. In what year after 1971 did the cities have the same population?
A. 1976
B. 1975
C. 1974
D. 1977