Answer:
X is 3 units.
Step-by-step explanation:
Volume of prism is cross sectional area multiplied by length. So 1/2 ×2× x ×2 into 3x, which is equal to 6x^2. So, 6x^2=54. Therefore, x=3.
If you wrote the expression correctly, then

Is a polynomial, and thus defined everywhere: its domain is the set of all real numbers.
If, by chance, you meant

Then we must exclude the point x=4 from the domain, since that value would cause the denominator to vanish. So, the domain would be the set of real numbers, minus the number 4.
Step-by-step explanation:
Total Price=SI+Priciple
SI=P×R×T
P=$1000
R=6%
T=3yrs
SI= 1000×0.06×3yrs
=$180
Total Price= Priciple + SI
=$1000 + $180
=$1180
After the first cut: 3
after the 2nd cut: 9 or 3²
after the 3rd cut: 27 or 3³
after the 4th cut: 81 or 3⁴
after the 7th cut: 3⁷ = 2187 small pieces of paper