Respuesta :
It would be C)15.75 miles because you divide it to get 2 hrs and divide again to get an hour then again to get half and hour and you add on the last number and 2nd to last so.. 42/2 is 21/2 is 10.5/2 is 5.25 add 10.5 and 5.25 is 15.75 which is 15 and 3/4 miles :)).