Solve. Write the answer as a mixed number as needed.A nail 6
inches long is driven into a board 2
inches thick. How much of the nail protrudes from the other side of the board?
A. 7
inch(es)
B. 
inch(es)
C. 3
inch(es)
D. 
inch
Answer: C
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In the diagram
(a) The pair ?3 and ?5 are ________________
(b) The pair ?1 and ?7 are ________________
(a) The pair ?3 and ?6 are ________________
(a) The pair ?1 and ?8 are ________________
(a) The pair ?4 and ?8 are ________________
Perform the indicated operation. Write the result in the form a + bi.(6 + 3i) - (-2 + i)
A. 8 + 2i B. -8 - 2i C. 8 - 2i D. 4 + 4i
Express the number in scientific notation.65,000
A. 6.5 × 105 B. 6.5 × 104 C. 6.5 × 10-4 D. 6.5 × 10-5
Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
A. Concave upward on (-1, ?); concave downward on (-?, 2); inflection points at (-1, 0) and (2, -3)
B. Concave upward on (0, ?); concave downward on (-?, 0); inflection points at (-4, 0), (-1, 0), and 
C. Concave upward on (0, ?); concave downward on (-?, 0); inflection point at (0, -1)
D. Concave upward on (-1, ?); concave downward on (-?, 2); inflection point at (2, -3)