Solve. Write your answer in simplest form.Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 12 hours. If he trained for 3
hours on the first day and 3
hours on the second day, how many hours would he need to train on the third day?
A. 5 hours
B. 5
hours
C. 5
hours
D. 4
hours
Answer: D
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Solve the problem.Select the correct statement for the definition of the limit: 
f(x) = L means that __________________
A. if given any number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
> ?.
B. if given any number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
< ?.
C. if given a number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
> ?.
D. if given any number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
< ?.
Find the vertex of the parabola, and determine whether the parabola opens upward, downward, to the left, or to the right.y = -(x + 6)2 + 4
A. (4, -36), up B. (-6, 4), down C. (-4, 6), down D. (4, -6), up
Apply the Quotient Rule and simplify the expression. Write the result with positive exponents only.
A. 1
B. 0
C. 
D. -1
Find the quotient.404.57 ÷ 1000
A. 0.40457 B. 404,570 C. 40,457 D. 4.0457