Sketch the indicated set. Describe the boundary of the set. Finally, state whether the set is open, closed or neither.{(x, y) : x2 + y2 < 4}
A. 
The boundary is the circle of center (0, 0)
and radius 2. The set is closed.
B. 
The boundary is the circle of center (0, 0)
and radius 2. The set is open.
C. 
The boundary is the circle of center (0, 0)
and radius 4. The set is closed.
D. 
The boundary is the circle of center (0, 0)
and radius 4. The set is open.
Answer: B
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Solve.The number of books in a small library increases according to the function 
where t is measured in years. How many books will the library have after 3 year(s)?
A. 3946 B. 4614 C. 7421 D. 3223
Determine if the equations in the given pair are equivalent. Each equation has only one solution.2(a - 5) = 4a - 10 and a = 0
A. Equivalent B. Not equivalent
Find the corresponding angle measure in radians.-45°
A. 
B. 
C. 
D. 
Multiply or divide.
(-15)
A. -6
B. 6
C. 
D. 8