Question

quantos segundos existem em 1 semana ?

Answer 1

1min ------ 60s       x=3600s
1h ---------- x

1h ---------- 3600s      x=86400s
24h --------- x

1 dia --------- 86400s     x=604800s 
1 semana --- x

Usa-se sempre regra de 3.

Answer 2

60x60: 3,600
3,600x24: 86,400
86,400x 7:604,800