bueno deberias dividir 39 en 38 para obtener tu resultado, de esta forma sabras que la hormiga avanza 1.0263157895 (o en forma redondeada 1.03) esto significa que la hormiga corre 1.03 mm en 1 segundo, esto deria tu resultado
well to get the answer of this you have to divide 39 by 38 to obtain your asnwer, in this way you will know that the ant travels the speed f 1.0263157896(or in a rounded form 1.03) this means that the ant runs 1.03mm in 1 minute, this should be your result.
Hope this helps
