Insert ? or ? in the blank to make the statement true.{1, 3, 6, 8} 
{1, 1, 3, 4, 5, 6}
A. ?
B. ?
Answer: A
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Find the focus and the directrix of the parabola.y = 2x2 - 8x + 7
A. Focus: 
; directrix: y = - 
B. Focus: 
; directrix: y = - 
C. Focus: (2, 7); directrix: x = 9
D. Focus: (2, 1); directrix: x = -3
The figure shows the percentage of the U.S. population, f(x), made up of teachersas a function of time, x, where x is the number of years after 1900. Use the graph to solve the problem. 
Use the graph to estimate f(60).
A. 1% B. 3% C. 60% D. 2%
Solve the problem.The floor plan of a building is shown in the figure below. Is it possible to start in one of the rooms of the building, walk through each door exactly once, and end up in a different room from the one you started in? (Consider the outside a "room".) Justify your answer.
What will be an ideal response?
Write an equivalent expression in exponential form.ln e1/4 = 
A. e4 = e1/4
B. e1/4 = e1/4
C. e1/4 = 
D. ln 
= e1/4