Which equation is a point-slope form of the equation of this line?

A.
`-2x + y + 5 = 0`
B.
`y = 2x − 5`
C.
`(y + 1) = -(1)/(2) (x − 2)`
D.
`(y− 1) = 2(x+ 2)`

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