Respuesta :

Answer:

Step-by-step explanation:

6.3x103 kg sand x 1x103 g/kg x 1 grain sand/7x10-5 g sand = 9x1010 grains of sand = 90 billion grains of sand.

90 billion grains of sand.

(6.3 x  103kg) (1 x 103g/kg x 1 )

DIVIDED by  7 x 10 - 5 g sand  

= 9 x 1010 grains of sand