Answer:
Circumference= 
Step-by-step explanation:
Diameter of the circle= 14 feet
Radius of the circle= 14/2= 7 feet
Circumference of the circle= 
As, 
Circumference:
The circumference of the circle with the radius= 7 feet is
Answer: 2004.3
Step-by-step explanation: 51% of 3930 is 2004.3
Answer: A. divided the difference of the two quantities by the sum of the two quantities.
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Explanation:
The difference of the quantities is 20-15 = 5
The sum of the quantities is 20+15 = 35
Dividing those results leads to 5/35 = 0.142857 which rounds to 0.1429
That converts to 14.29%
This is likely the path Adam took. This path is incorrect. The correct steps are shown below
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Difference = 20-15 = 5
Divide the difference over the original quantity
5/20 = 1/4 = 0.25 = 25%
We have a 25% decrease because the new quantity (15) is smaller than the old quantity (20)
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Here's another way to approach the problem
A = old value = 20
B = new value = 15
C = percent change
C = [ (B-A)/A ] * 100%
C = [ (15-20)/20 ] * 100%
C = (-5/20)*100%
C = -0.25*100%
C = -25%
The negative C value means we have a negative percent change, ie we have a percent decrease. So this is another way to get a 25% decrease.
I got x=2.64 or x=1.32 i don't know if i done it right
