Question

One grain of this sand approximately weighs 7 x 10^-5 grams how many grains of sand are there in 6300kg of sand?

answer in standard form.

Answer 1

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

Answer 2

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.