
Concept explainers
(a)
To find:Draw the sketch of the cable and label the coordinates of the known points.
(a)

Answer to Problem 101E
The sketch of the cable is shown in the figure(1) with labeled known points.
Explanation of Solution
Given information:
A cable of the Golden Gate Bridge is suspended between two towers that are
Calculation:
The sketch of the cable is shown in the following figure:
Figure(1)
(b)
To calculate:The equation that models the cable.
(b)

Answer to Problem 101E
The equation that models the cable is
Explanation of Solution
Given information:
A cable of the Golden Gate Bridge is suspended between two towers that are
Calculation:
According to the sketch in part(a), the cable models in an upwards parabola with vertex at origin.
The general equation of the parabola is
As it is clear from the sketch that the parabola passes through the point
Now substitute
Therefore, the equation of that models the cable is
(c)
To calculate:Complete the table by finding the height
(c)

Answer to Problem 101E
The complete table is given below:
Explanation of Solution
Given information:
A cable of the Golden Gate Bridge is suspended between two towers that are
Calculation:
As calculated in part(b) the equation that models the cable is
Now substitute
This gives the table:
Therefore, the complete table is shown above.
Chapter 9 Solutions
Precalculus with Limits: A Graphing Approach
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