If we know the value of r (radius) we can find the circumference of circle using formula 
Step-by-step explanation:
We need to find the circumference of circle.
Since the picture is missing in the given question so I will explain the method to find the circumference of circle.
You can use this method to find circumference of the given question.
The formula used to find circumference of the circle is

Where π is pie and its value is 3.14
and r is radius of circle
So, if we know the value of r (radius) we can find the circumference of circle using formula 
Keywords: Circumference of Circle
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Answer:
The answer is 3418.1 ft rounded to the nearest tenth.
Step-by-step explanation:
The total volume of the cylinder can be defined by the Area of circular base * Perpendicular height.
The area of the circular base can be calculated as

where r is the radius of the circular base, which is 8 ft.
The area of the circular base is

We also know the height of the cylinder is 17 ft.
Hence, the volume of the cylinder is

This will be rounded up to 3418.1 with the nearest tenth
X^2 - 25 = 0
Add both sides by 25
x^2 = 25
Take the positive and negative square root.
x = 5
OR
x = -5
Have an awesome day! :)
Answer is the second one. an= -0.5n2-n+9