thodorist987 thodorist987

05-01-2021
Mathematics

contestada

One grain of this sand approximately weighs 6 x 10^-6g.
b) How many grains of sand are there in 7200 kg of sand?
Give your answer in standard from.

Respuesta :

mhanifa mhanifa

05-01-2021

Answer:

1.2×10¹² grains

Step-by-step explanation:

1 grain = 6×10⁻⁶ g

7200 kg =
7200000 g =
7.2×10⁶ g =
7.2×10⁶ ÷ 6×10⁻⁶ =
(7.2÷6)×10⁶⁻ ⁽⁻⁶⁾ =
1.2×10¹² grains

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