Answer:
The slope of a line that is perpendicular to the given line is 
Step-by-step explanation:
The equation of the line in Slope-Intercept form is:

Where "m" is the slope of the line and "b" is the y-intercept.
Solve for "y" from the equation of the line
:

You can observe that the slope of this line is:

By definition, the slopes of perpendicular lines are negative reciprocal, then, the slope of a line that is perpendicular to the give line, is

Answer:
a. 7 x 2
Step-by-step explanation:
6 5/8 is closer to 7 and 2 1/3 is closer to 2
A ≈ 78.46 ft
To find the answer just look up the formula for finding area with circumference and plug in the circumference