BaddieNiy0214
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A grain of sand weighs about 1 x 10 g.
Researchers at the University of Hawaii
estimate there are 7.5 x 108 grains of
sand on all the beaches of Earth. How
much do all of these grains of sand
weigh?
O A. 7.5 x 10 g
OB. 8.5 x 10g
O c. 7.5 X 102 g
O D. 8.5 X 102 g​

Respuesta :

skyluke89

Answer:

[tex]7.5\cdot 10^9 g[/tex]

Step-by-step explanation:

In this problem, we are told that the mass of 1 grain of sand is:

[tex]m=1\cdot 10^1 g[/tex]

The total mass of N grains of sand will be therefore

[tex]M=Nm[/tex]

where

N is the number of grains of sand

M is the total mass

Here we have a number of grains of sand equal to

[tex]N=7.5\cdot 10^8[/tex]

Therefore, the total mass of the grains of sand is:

[tex]M=(7.5\cdot 10^8)(1\cdot 10^1 g)=7.5\cdot 10^9 g[/tex]

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