Sagot :
bonjour
1. 3 m ³ s = 259 200 m ³ / jour
53 x 259 200 = 13 737 600 m ³
volume = 1.37376 x 10 ⁷ m ³
2. 10 ⁻¹⁵ x 100 000 = 10 ⁻¹⁵ x 10 ⁵ = 10 ⁻¹⁰
taille = 10 ⁻¹⁰ m
3. 2 cm = 50 000 cm réels
1 cm = 25 000 cm
8.25 x 25 000 = 206 250 cm =2 062.5 m