<h3>
Answer: A) around 80 cm</h3>
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Explanation:
The perimeter around the circle, aka circumference, is found through this formula
C = 2*pi*r
That's for a full circle. However, we're dealing with semicircles here, so we cut that in half to get pi*r to represent the curved distance around half the circle.
For the outer larger semicircle, that curved distance is exactly 14pi
For the inner smaller semicircle, that curved distance is 7pi, since 7 is half of 14.
The total curved portions is 14pi+7pi = 21pi
Then we add on the last straight line portion that's 14 cm long to get a total perimeter of 21pi+14
This is the exact perimeter in terms of pi.
The last thing to do is replace pi with 3.14 and simplify
21pi+14 = 21*3.14+14 = 79.94
This value rounds to 80
<h3>
Answer: 16 feet</h3>
Work Shown:
L = 6 = length
W = 2 = width
P = 2(L+W)
P = 2(6+2)
P = 2(8)
P = 16 feet of fencing is needed
An alternative formula is P = 2L+2W
2x + 20 = 52.............
Answer:
If you are camping in a rural setting and look up at the night sky, it can appear
Ok so you have to do x+2x+6=0 and then simplify it to 3x+6=0 and then subtract 6 from both sides of the equal sign and you will get 3x= -6 and then divide both sides by -6 and your final answer should be x= -1/2 or .-5
