We have been given the expression

We have to write this expression in the form 
In order to write the given expression in this form, we can use some exponent property.

On using the property (1), we have

Now, on using the property (2), we get

Therefore, the simplified form of the given expression is

I think it is .8 i could be wrong i’m not sure
Circular pen means you are going to use Area = Pi(r^2).
So 78.5 = pi(r^2). Divide by pi on both sides to get r^2 = 78.5/pi. Take the square root of that to get r or radius = approximately 4.99. If you need an exact answer then use

for the next part because you are not done yet.
Plug whatever R you use into the circumference formula of Circumference = 2(pi)(r).
If you use 4.99, you do 2(pi)(4.99) which is approximately 31.35. If you use the exact answer, you do 2(pi)(

) which gives you approximately 31.41.
Either way you'll need about 31 meters of chicken wire but the 31.40796 or ~31.41 is closer to the exact answer.
That equal 1 because they are the same