Find the exact value using a double-angle identity.cos 
A. - 
B. - 
C. 
D. - 
Answer: D
Mathematics
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The line graph below shows the price of a stock over the course of the day. Use the graph to answer the question(s).
At what time was the stock price the lowest?
A. 6 PM B. 1 PM C. 9 AM D. 10 AM
Mathematics
Solve the application and answer with a complete sentence.Harry cuts a board 
feet long from one 8 feet long. How long is the remaining piece?
A. The remaining piece is 2
feet.
B. The remaining piece is 2
feet.
C. The remaining piece is 2
feet.
D. The remaining piece is 3
feet.
Mathematics
Determine the vertex and the x-intercepts. Then sketch the graph.y = x2 - 4
A. 
Vertex: (0, -4); x-intercepts: (-2, 0) and (2, 0)
B. 
Vertex: (0, 4); x-intercepts: none
C. 
Vertex: (0, -4); x-intercepts: none
D. 
Vertex: (-4, 0); x-intercept: (-4, 0)
Mathematics
Divide:
Mathematics