Why did most ancient cultures primarily write out their mathematical texts in words

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

Last week , donnell practiced the piano 3 hours longer than marcus . together, marcus and donnell practiced the piano 11 hours . for how many hours did each young man practiced the piano

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!