Find the direction the parabola opens, the coordinates of the vertex, the equation of the axis of symmetry and draw the graph.x = 2(y - 2)2 - 2 
A. 
opens left; vertex (2, 2);
axis of symmetry y = 2
B. 
opens right; vertex (-2, 2);
axis of symmetry y = 2
C. 
opens right; vertex (2, 2);
axis of symmetry y = 2
D. 
opens right; vertex (-2, -2);
axis of symmetry y = -2
Answer: B
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Find the sample standard deviation of the data set.
Use the following information to answer question, 24 students in an engineering class were asked to record the number of hours spent in a lab during a week. The results are listed below. 3, 10, 21, 14, 8, 5, 1, 4, 13, 7, 9, 6, 11, 10, 6, 7, 12, 16, 1 , 7, 14, 1, 11, 8
For the compound inequality, decide whether intersection or union should be used. Then give the solution set in both interval and graph forms.3x + 2 ? -16 or 3x ? -9
A. Union; (-?, -6] ? [-3, ?)
B. Intersection; [-6, -3]
C. Union; (-?, ?)
D. Intersection; ?
Solve the problem.A bookstore is having a sale. All books included in the sale have a colored sticker on them to indicate the sale price. There are green stickers, red stickers, and orange stickers. Bob, Sue, and Fred each make purchases of books that are on sale. Each row of the table gives information about the numbers of book purchases and the total cost of the purchase (before taxes).
Use this information to set up a matrix equation of the form 
which can be solved to determine the price for each type of sale book. Solve this matrix equation to find the price of a
book with a red sticker.Use the fact that for A = 
, A-1 = 
.
A. $6.50
B. $6.99
C. $6.87
D. $6.79
Solve the problem.The function 
can be used to determine the milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams (to two decimals) will be present after 
A. 0.13 mg B. 4.51 mg C. 0.61 mg D. 382.19 mg