For items 15-20, Complete the cross number puzzle by determining the common ratio and the missing term of a geometric sequence. Answer will be written in the puzzle for self checking 16 18 19 20 HE 15 17 1 1 Across: 1 . 15) 10'100' pony 10000 16) 10th term of the sequence -12, 24, -48,... 17) 2, 4, 8, 16, ... az 32 12 own: 18) 750, 150, 30 _ 19) 11, 44, 176, 704. 20) 4, -2, 1, -5 r = 2' 1​