Bonjour,Combien faut il ajouter de dam² a 15 hm² pour obtenir 3 km² svp ?

By: USER7968
26 Agustus 2025 mathematiques 5 minutes
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Question

Grade: Education Subject: mathematiques
Bonjour,Combien faut il ajouter de dam² a 15 hm² pour obtenir 3 km² svp ?
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Best Answer
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Réponse :

28500

Explications étape par étape

15 hm2 = 0,15 km2

Il faut donc encore 2,85 km2

2,85 km2 = 285 hm2

285 hm2 = 28500 dam2

Je ne suis pas totalement sur mais c'est le seul truc qui me vient.

Answered on 26 Agustus 2025

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URGENT DM s'il vous plait ..
Les fibres optiques permettent de transmettre des radiations parfois sur de longues distances .
Elles sont utilisées dans les télécommunications pour la réalisation de réseaux haut-débit ou en médecine dans les fibroscopes pour observer et traiter certaines parties internes du corps comme l'estomac.
On considère une fibre optique constituée d'un coeur cylindrique transparent d'indice nc= 1,52 entourée d'une gaine transparente d'indice ng=1,48 .
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Ecriture scientifique.

Bonjour! Je vais bientôt avoir un contrôle et non ca rentre pas, je ne comprends pas comment je peut donner l'écriture scientifque d'une fraction! (le nombre je sais) 
J'ai 2 exos sur ça, je vous en donne, si vous pouviez m'expliqué j'essayerais seule l'autre :

A = 12 x 10 puissance -3 
       _________________
         4 x puissance 5

B = 4 x 10puissance14 x 12
      __________________
       3 x 10 puissance 11
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