Respuesta :
The Formula for cm to mm is cm x 10 = mm so to replace it it would be, cm=9.78, so
9.78 x 10 = 97.8 mm hope this helped :) plz mark brainliest ʕ•ᴥ•ʔ
9.78 x 10 = 97.8 mm hope this helped :) plz mark brainliest ʕ•ᴥ•ʔ