Find the x-intercepts of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = -x3(x + 4)2(x - 7)
A. 0, touches the x-axis and turns around;
-4, touches the x-axis and turns around;
7, crosses the x-axis
B. 0, crosses the x-axis;
4, touches the x-axis and turns around;
-7, crosses the x-axis
C. 0, crosses the x-axis;
-4, touches the x-axis and turns around;
7, crosses the x-axis
D. 0, touches the x-axis and turns around;
4, crosses the x-axis;
7, crosses the x-axis
Answer: C
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given that 
and 
A. Local minimum at 
B. Saddle point at 
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D. Local maximum at 
Solve the problem.Two hikers on opposite sides of a canyon each stand precisely 525 meters above the canyon floor. They each sight a landmark on the canyon floor on a line directly between them. The angles of depression from each hiker to the landmark meter are 37° and 21°. How far apart are the hikers? Round your answer to the nearest whole meter.
A. 2064 m
B.
| 2063 m |
C. 2065 m
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Convert the units using unit fractions.0.25 lb = 
oz
A. 2 B. 6 C. 8 D. 4
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, 5 - 
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