What is the 20th term of the sequence that begins -4 8 -16 32

Our rule seems to be -2x.
Term 1; -4.
-4(-2) = 8 (term 2)
8(-2) = -16 (term 3)
-16(-2) = 32 (term 4)
32(-2) = -64 (term 5)
-64(-2) = 128 (term 6)
128(-2) = -256 (term 7)
-256(-2) = 512 (term 8)
512(-2) = -1024 (term 9)
-1024(-2) = 2048 (term 10)
2048(-2) = -4096 (term 11)
-4096(-2) = 8192 (term 12)
8192(-2) = -16384 (term 13)
-16384(-2) = 32768 (term 14)
32768(-2) = -65536 (term 15)
-65536(-2) = 131072 (term 16)
131072(-2) = -262144 (term 17)
-262144(-2) = 524,288 (term 18)
524288(-2) = -1048576 (term 19)
-1048576(-2) = 2097152 (term 20)

The 20th term is 2,097,152.

I hope this helps!

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )