Respuesta :
Answer:
6 zeroes
Step-by-step explanation:
When you multiply numbers with zeroes, you multiply the non-zero digits and add the zeroes left. 30x40x50x60x70 will have 5 zeroes because every number ends in a zero. But you have to add one more zero because 4x5=20, and 20 ends with a zero.
Therefore, the answer is 6 zeroes.