Question 450018
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Hi, 
It is the policy to not list a number of questions together.
Will quickly try to help You with some of them.
1. 180(n-2) = 108 where n is the number of sides
2. 180(n-2)*n = 1260 where n is the number of sides
3. A = 330ft^2  330ft^2*$15/ft^2 = $4950. NO, cannot afford the wood floor
4. 128cm/4 = 32cm  32cm^2 = 1024 cm^2
5. Feet of fencing = P - 3ft = (20+17+9+13) - 3
6. For myself use a calculator that does the conversions