Un appareil envoie une lumière rouge toutes les 13 minutes 45 secondes et cet appareil émet un <<bip sonore >> toutes les 15 minutes 30 secondes . A ma plus grande surprise, il vient de faire les deux en même temps ! 1) dans combien de temps cela va-t-il se reproduire ? détailler.
2) Donner la réponse sous forme heure, minutes, secondes. Détailler ​

answer:

this commercial passage is a real success. all the shops are great! there is a small biocoop to out with bio from quality, a well-known pastry chef, a wine seller, an italian brasserie offering midday meals on a superb terrace where the dishes are plentiful, the food is quality, the ice creams are made by the owner early in the morning and a very nice bookstore located in a pleasant setting and out of time. the highlights are relevant and well presented, we feel a real expertise on the part of booksellers and not just a desire to sell. lesrayons are filled with beautiful things for young and old. and very lively. you wouldn't think you were in strasbourg. an ideal place to spend delicious moments around a good coffee, a typical italian dish, a trendy pastry shop while reading a good book bought in the bookstore.

answer:

a. blow into a drinking straw over the sand.

hope this , have a great day/night!