Find the next two terms in the sequence. 0, 1, 4, 9, . . a. 13, 18 b. 13, 17 c. 16, 23 d. 16, 25

Well, we knew that from 0 to 1 you add '1', from 1 to 4 you add '3', from 4 to 9 you add '5', from 9 to ? you add '7'!

So 9+7=16.

16 to ? you add 9! 16+9=25

The next 2 terms are 16 and 25.

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 : )