Solve for X

show me what steps to do for this one​

What is the value of the expression below? (81^2)^1/8

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]