I need help on these ??!!

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

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

Which table represents points on the graph of h(x) = 3√-x+2?