Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. closed infinite interval; {x|x ? 2}; [2, ?)
B. open infinite interval; {x|x > 2}; (2, ?)
C. open infinite interval; {x|x < 2}; (-?, 2)
D. closed infinite interval; {x|x ? 2}; (-?, 2]
Answer: C
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Solve the problem.A rectangular box with square base and no top is to have a volume of 32 ft3. What is the least amount of material required?
A. 36 ft2 B. 40 ft2 C. 48 ft2 D. 42 ft2
Find the area of the square.
9 mi
A. 36 sq mi B. 84 sq mi C. 77 sq mi D. 81 sq mi
For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 
x2(x2 - 3)(x - 1)
A. 0, multiplicity 2, touches x-axis;
1, multiplicity 1, crosses x-axis
B. 0, multiplicity 2, crosses x-axis;
1, multiplicity 1, touches x-axis
C. 0, multiplicity 2, crosses x-axis;
1, multiplicity 1, touches x-axis;
, multiplicity 1, touches x-axis;
-
, multiplicity 1, touches x-axis
D. 0, multiplicity 2, touches x-axis;
1, multiplicity 1, crosses x-axis;
, multiplicity 1, crosses x-axis;
-
, multiplicity 1, crosses x-axis
Multiply.(4n9 + 8)(4n9 - 8)
A. 16n18 - 64 B. 16n18 - 32n9 - 64 C. 4n18 - 64 D. 16n18 + 64