76 because you have to add them multply then divide
<h3>Scott needs to buy 50.24 feet of fencing</h3>
<em><u>Solution:</u></em>
Given that,
Scott wants to buy fencing to place around a circular rock garden
The diameter of the circle is 16 feet
The amount of fencing Scott will need to buy is equal to the circumference of circular garden
<em><u>The circumference of circle is given as:</u></em>

Where, "d" is the circumference of circle
From given,
d = 16 feet
Therefore,

Thus, Scott needs to buy 50.24 feet of fencing
From the equation, it looks like we can set up a triangle like this. One side is x and the other is x + 20 because the northbound car traveled 20 miles farther. The hypotenuse is 100 because they were 100 miles apart.
Next, we can use the Pythagorean Theorem to solve for x:
a² + b² = c²
x² + (x + 20)² = 100²
This simplifies to:
x² + x² + 40x + 400 = 10000
2x² + 40x = 9600
2x² + 40x - 9600 = 0
After that, we can divided each side by 2:
x² + 20x - 4800 = 0
Next, we have to factor:
(x - 60)(x + 80) = 0
x = 60, -80
Since we know that distance can't be negative, 60 is the valid answer in this case.
x = 60
x + 20 = 80
Using this information, we know that the westbound car traveled 60 miles and the northbound car traveled 80 miles.
The answer is 140, you just add them up and it goes by 2.